Originally Posted by Fat -Manaphy--
Blaziken does that better thanks to Speed Boost, and higher attack to overcome the added Iron Fist damage.
Please tell me how Speed Boost makes a negative priority attack (Focus Punch) better. -_-
Infernape has a lot of coverage, and it can revenge more things immediately, making it easier for you to force out an opponent and score that crucial Focus Punch. The attack difference doesn't really matter, and you'll be able to force out a few more targets thanks to that nice initial speed.