Of course. Well, In my state, he was fairy good in my terms, but seeing as you must have spent weeks training seeing as you can kill captains (which is pretty good actually with the equipment you have) You will have the chance to unequip Minwu. After Dreadnaught leaves, and you enter Altair, immediately unequip Minwu, as he will leave your party. Forever. Don't worry though, you'll get a kewl monk after that (who will seem weak to you, but don't bother leveling him up -_-')
