Life Orb is a better choice because of Infernape versability (adaptability), he can learn U-turn that he's very handy for a lead pokemon. For other moves, mach punch, flamthrower/Heat Wave and Close Combat are very cool for this pokemon, but if you wanna some pure physical power, replace flamethrower by Flare Blitz, but is staying power will decrease a lot. Flamethrower is for defense stall, mach punch for priority, Close Combat for special stall + brute power and U-turn is for the momentum (If you see a water or ground pokemon after using Close Combat 2 times, use U-turn and switch for a pokémon that can take out the water or ground type.) The appropriate talent for this set would be blaze, cuz the life orb will take some hp of your pokemon each turn, so blaze can be activate, iron fist will just work on mach punch, but a destructive flamethrower is more handy. I advice you to get a pokemon with Grassy Terrain and to find a move tutor so your Infernape can learn Heat Wave, it will turn the Grassy Terrain on a Burning Field, so Blaze will always be activate and Heat Wave will do destructive damage! The Grassy Terrain user should in preference have Sunny day (like Comfey, this pokemon can learn Grassy Terrain, Sunny Day, U-turn and Nature Power that can transform into Energy Ball in the Grassy Terrain and into Flametrower into the Burning Field + becoming handy in the leaders Field.) So ya...Good Luck and have a great experience with the game!!!