I have decided to do another allocation plan completely taking the Percy Main changes out of question given the fact that I am not creative :P
Prince Bishops: Remaining Streetlites displace the 5 remaining solars to: 
5217 would transfer to Stanley replacing 4896
4971, 4972, 5211 and 5216 would transfer to Riverside to replace 4897-4900
Centurion 17, 17A and NEW 18: 36 Streetlites (including 4 red spares) would come for services 17/17A and NEW 18. The 17 would be half-hourly full route, whilst the 17A would not run from the foot of Churchill Street to Wallsend, instead going up Churchill Street, to Northumberland Park via Cobalt taking just under one hour to complete the full route. The service would provide a journey every 15 minutes combined frequency between Rosehill and Whitley Bay and would run with a PVR of 4. The new 18 would run from Haymarket to Blyth following this route:
Haymarket following Stagecoach service 1 to Heaton Park Road, then along Shields Road in Byker following the Coaster 1 as far as Wallsend, the bus would then follow the 17 route as far as Benton ASDA, where it would go to Northumberland Park via Holystone, then it would head to South Welliford and then onto North Whitley Bay from there it would follow the Arriva 308 route to Blyth taking about 2hrs 30mins. 
The following buses would be withdrawn:
All dual door renowns at Percy Main as well as 4912.

Red Arrows and TTX: 13 streetdecks would come for Riverside and Peterlee (7 Peterlee and 6 Riverside) allowing for an every 15 minute combined frequency Newcastle-Middlesbrough and dual depot operation, also it would allow Peterlee to operate the peak time 265.
This would allow for the following allocation plans:
6043-6048 and 6084 would be branded Red Arrows replacing 3943 and 6001-6006 with 6007 being a red spare, also all other Red Arrows deckers would gain plug sockets and 6043-6048 would gain 6001-6006's NSAs.
3943, 6001 and 6002 would replace 3818, 3819 and 3824 at Riverside.
6003-6006 would replace Stanley's Olympians bar 3832 which would be replaced by surplus 3966 from Riverside.

Blaydon Racers, LOOP, NEXUS Solos, Tynedale Links, South Tyne, NEW 33, InDiGo Peterlee TOON Link, Lambton Worm , Green Arrow, Castle Link(OK WAY), SimpliCity, Fast Cats, WTX and NEW CityLink Sunderland: 18 Streetlites (including otwo red spare) would come for Blaydon Racers 49 services. Service 49C would be renumbered 49B and would run half-hourly through the day replacing service 64. Service 12/12A would join the Blaydon Racers brand. NEW 98 would run with spare TOON Link omnicities running Eldon Square-Gateshead then the current 29 route to Kibblesworth and then following Birkland Lane to Sunniside and then down to Whickham taking just under one hour. 9 streetlites (including one red spare) would come to Deptford for SimpliCity 2/2A. 11 Streetlites (including one red spare) would also come to Deptford but for new 61 service which would be branded CityLink Sunderland, it would run every 15 minutes between Murton and Downhill (Current 61 route to Park Lane then the current X36 route to Downhill) taking just under one hour. Meanwhile even more streetlites would be destined for Deptford (16 to be precise including two red spares) for Fast Cats X35/X36 services. However the current X36 would be numbered 36A and would be rerouted to follow the 27 route between Gateshead and Heworth using cascaded Solars. New X36 would run the current X9/X10 route Newcastle Eldon Square-Testo's where the new service would follow the A19 as far as NISSAN where it would follow the current 56 route to Park Lane. This service would be every 20 minutes. 10 optare metrocities would replace 8294-8301 and 4935 on services 88/88A. 5 Streetlites would come to Chester-le-Street for 34/34A. The 265 would leave the InDiGo brand and new 168 service would join the brand with one solo becoming spare. Riverside would run Sunday 32/32A journeys.
This would require the following allocation plans:
4935 would be withdrawn
5276-5283 would be branded LOOP (5275 would be a red spare) replacing 5219-5226.
5235-5238 would be painted red for use on new 98.
5234 would transfer to Stanley to replace 4903.
5220-5222 would replace 4913-4915 at Percy Main.
5223 and 5224 would replace 4901 and 4902. 5225 and 5226 would transfer to Deptford for service 36A.
8324-8327 would transfer to Riverside for new service 11 (old 11A, current 11 would be numbered 62) and new 11A would run the current X84 route to Wylam then the 686 route to Prudhoe with a PVR of 3 using 8319-8321.
8322 and 8323 would replace 5323 and 5324 at Riverside allowing them to go to Deptford and to be branded WTX allowing for dual depot operation and an every 30 minute frequency.
8308 and 8309 would transfer to Crook replacing 571 and 572 on the 18 which would be renumbered 22 to avoid website conclusion. 8328 would be a red spare.
8295-8306 would be branded Green Arrow with 8294 being a red spare, also this would allow for the X97 to run through the day half-hourly.
8307 and 8328 would transfer to Riverside for the 33 contract
626 which is freed up by the 29 becoming non supported will replace 557 on the ASDA Byker contract, 633 which is freed up because of the loss of service 68 will be used on newly awarded 13 service these two vehicles would be used on Sunday 32/32A buses.
631 and 632 would transfer to Deptford replacing 549 and 550
625 would replace 553 at Stanley
627 would be used on service 686 to allow for a PVR of 2 and a full route hourly frequency Ovington-Prudhoe
5208 and 5209 would transfer to Peterlee for the 265.
5207 would replace 4925 at Deptford.
5204-5206 would replace 6009, 6012 and 6013 at Stanley on the 15/15A.
4968, 4974-4976 and 5203 would be used on a service noted below
4973 would be used at Riverside replacing 4932.
653 would be freed up by the 265 and would replace 559 at Deptford.
4938, 4940 and 4941 would be withdrawn
4947, 4948, 4967, 5218, 5227 and 5228 would replace 4918-4920, 4922, 4923 and 5167.


Angel, Crusader and NEW Airport bus 737: 21 Streetdecks come for service 21 without tables allowing for 2 red spares and every 12 minute full route and every 6 minute Newcastle-Chester-le-Street service.
This would allow for the following allocation plans:
6057-6070 would replace 5310-5319, 5328-5330 and 5332 with 6057 being a red spare.
6056 would transfer to Stanley replacing 3864.
3962 and 3965 would replace 3869 and 3872 at Chester-le-Street.
5310-5314 would be branded for a new airport service to challenge the metro with one branded spare being every 15 minutes.
5315-5317 would transfer to Deptford to replace 4905, 4907 and 4911.
5318, 5319, 5328-5330 and 5332 would replace 4918-4920, 4922, 4923 and 5167.

TEN, Red Kite, NEW X19, Tynedale Express, Tynedale Links and Venture: 17 Streetdecks would come for TEN services 10 and 10A (10B renubered 10A and 10A leaves TEN brand and is renumbered 63) this also allows both services to be every 20 minutes. Tynedale Express services would each run every 30 minutes allowing 4 buses an hour on the X84/X85. 
This would allow for the following allocation plans:
6071-6079 would be used on Tynedale Express X84/X85. 6071 would be a red spare
6080 and 6081 would transfer to Stanley to allow the 47 to allow for it to extend to Consett using the V9 route allowing the V9 and the 45E to be withdrawn.
6082 and 6083 would transfer to Chester-le-Street to replace 3875 and 3878 at Chester-le-Street
3941 and 3942 would transfer to Stanley to replace 3876 and 3880.
5232 and 5233 would be branded Tynedale Links to replace 556 and 619 at Hexham allowing services 680, 688 and 74 to be operated by full size buses.
5229-5231 will transfer to Deptford to be used on new X19 express between Sunderland and Durham only calling at Houghton-le-Spring taking just under 45 minutes every 30 minutes with a PVR of 3.
4974-4976 and 4968 would be used on service 63.
5203 would be used at Hexham to allow service 687 to run hourly.
642 would be freed up by the loss of the V9 and would be used replacing 560.
619 would replace 562.
618 would be a red spare at for Tynedale Links services.
556 would be withdrawn.

InDiGo Washington: 11 37 seat optare solos come for Washington (including one red spare) for services 82/82A/82B/83/83A/85/86 which would be InDiGo Washington. 
This would allow for the following allocation changes:
570 would be withdrawn
603-606 would transfer to Deptford to replace 564, 565, 573 and 574.
8261 would replace 4933 at Riverside
8262 would replace 4934 at Chester-le-Street
8263 and 8264 would replace 4936 and 4937 at Deptford.
8265 would replace 8258 at Deptford
8267 and 8271 would be withdrawn.

Wagonway: 11 streetlites (including 1 red spare) come for 28/28A at Chester-le-Street allowing for an every 15 minute combined frequency.
This would allow 4956-4960 to be withdrawn

Cross Tyne and Coaster: 9 streetlites (including one red spare) would come for Percy Main for service 9 allowing a full route frequency of every 15 minutes. Short Coaster 1 buses would be renumbered 1A and would follow the 1A route to Kibblesworth with a PVR increase of two.
This would allow for the following allocation plans:
3978-3980 would move to Chester-le-Street replacing 6017-6019.
5273 and 5274 would be branded Coaster.
4916 and 4917 would be withdrawn.
5248 and 5249 would move to Riverside 4943 and 4944.

Cobalt Connect 19 and NEW 19A: 9 streetlites come for Percy Main (including 1 red spare) for Cobalt Connect 19/19A. The 19A would be the short 19's extended to Morpeth following the normal 19 to Cramlington then the Arriva 43 to Morpeth.
This would allow for the following allocation plans: New 62A service would run Newcastle-Chopwell East Street following the 12A Newcastle-Winlaton then the 792 Winlaton-Chopwell. The journey would take just under one hour running every 30 minutes with a PVR of 4.
This would allow the following allocation plans:
4978-4982 transfer to Riverside for use on 62A.

Northern and DFDS: 11 Streetdecks would come for 6/X70/X71 (including 1 red spare) 
This would allow for the following allocation plans:
6122-6127 are branded DFDS and transfer to Percy Main
6128-6132 would replace 5 of Percy Main's presidents
3890 and 3891 would be reserve vehicles
3866 and 3867 would be withdrawn
Thank you for reading :)