FC recently downed turn4 for the 3rd time. All 3 were with PLD/WAR, and 3 different WAR players. Turns 1 and 2 work ok with WAR too.

Just re-iterating what was more or less said already: WAR can be sufficient. But there's little need for what WAR can do better than PLD currently (and NOT vice versa).

If you're just pugging coil as a warrior, I doubt that will go well. Join a decent FC and it'll be much better.