I'd do all the other stuff before messing with the adjustable FPR or the new coil packs.
And even then, I dunno that those BavAuto coil packs provide that much punch, but they are about the same price as regular replacement ones, maybe a bit more but not much.
If you've never replaced the coil packs, and you don't know when it was done, now would probably be a good time to do so.
What about your plug wires, ever replaced those?