I dont really face this problem.. A party for tombs should have 1warr atleast(unless there are 4 maxed out rouges)
Its just that its not good to have more than 1 warr on 1 party because it just slows us down.
I dont really farm arena so idk about it..
But if u look at it warrs are not a necessity for arena since its hard to taunt arena bosses and the other party sometimes ends up getting damaged.. When the main purpose of warr is defeated then its useless to have warr in the party