TH 9 has some serious limitations when attacking a maxed Th9 to mid TH 10. Pekka 4 would help give GoWiPe some much needed firepower.
Essentially, Th9 runs the same GoWiPe level setup as a maxed Th8 with the exception of Golems that are a level higher.
Level 4 golem
level 5 wizard
level 3 pekka
More tanking is not whats needed in this army comp but it does lack in dps. Pekkas die a long time before golems.

