I have both war/pld equally geared and can assure you there isn't a single moment where a warrior feels like a necessity.
You can use 2 pld for turn1-7 and EX but it can't be said the same for warrior. My point is, tell your Static War isn't needed unless they're stubborn and must playby the rulebook... Only level war if you personally want to but otherwise level something else for a different perspective(healer/dps).
War was only good for T5 cause of the extra hp/inner beast from death sentence, but now with echo buff, it doesn't even matter anymore. Whether you play pld or war, your job is just to hold hate and take damage so they're 1 and the same.

Basically a warrior is a 1 trick pony that should stick to MT, fun at the start but a chore to use. Warriors don't get an exclusive slot in party finder for a reason, 2 pld? Ok 2 war? No thanks. .
Just wanted to save you the trouble of leveling something unnecessary cause you can already do all those with pld.