Both of these abilities don't help Raikou too much, but I believe Inner Focus would be the less valuable of the two. Raikou has a really good speed tier, and therefore cannot gain much benefit from Inner Focus since mons like Togekiss and Cobalion are obviously slower and can't flinch Raikou down anyways. The only positives Raikou gains from using Inner Focus (if I haven't overseen anything obvious) would be a random Fake Out or avoiding a Dark Pulse flinch from Scarf Hydreigon. Pressure, on the other hand, offers more usability in that you can sap away at the PP of moves such as Serperior's Leaf Storm when Raikou is running the SubCM set. It doesn't have any other notable uses besides this, but I think that the pros to running Pressure on Raikou slightly outweigh the benefit Inner Focus provides.
I'd run Inner Focus to help against the Ambipom wave. Not that it will help any.





















