*shrugs* I don't know how this build is supposed to work. He's the one who designed it, not me. But if he thinks it's going to be good, maybe it will be. He's been RPing a lot longer than I have so maybe he sees something we don't. Not a clue. And the PF fighter is no longer Tier 5. It's probably low Tier 4 now.
Well you'd have to re-work the tier system to back up such a statement.
The paladin got a lot better as well. The barbarian too probably.
So all in all I don't think it's a very optimised fighter build, not from using feats outside of pathfinder, I'd find a lockdown fighter, an archer fighter or something else entirely to be better at what he wants to do (protect the wizard).
Off course the Tier system is still in effect in pathfinder, it is just less clear and the classes might have moved one tier closer together, giving us 4-5 tiers instead of 6, but you can classify the JaronK system that way as well if you want to, it's just a scale of power, and there is a scale of power in pathfinder. Smite is for example a lot better than weapon or armour mastery of the fighter, and the other abilities of the paladin is also a bit more useful than the fighters equavilents (not to mention armour profiency makes the fighter MAD). And Barbarians are Decent spring attackers.