How strong can someone make a Level 1 fighter, in Pathfinder, excluding Polymorph spells that change their body to another creature type?


It’s a classic trope in fiction, the "not so great" heroic character is going up against a foe they have no business trying to defeat and one (or more) of their allies that are a bit more powerful do a little something here, a little nudge there, and now the would-be hero is performing feats they never would have been able to do on their own.

What, in your estimation, would be the way to go about showing this sort of trope in a game like Pathfinder 1e? Defensive buffs out the wazoo are all well and good, but their low HD is also something to keep in mind, as Con buffs will be less effective. To ensure that the illusion is kept up as well, they’ll need to stay as their original race, no True Polymorphing them into a dragon or whatnot.