Since other ultimate is hardly used like medical herb (rog) and grand protection (mage). I hereby suggest some new ult to change the hardly used or add new ult.

Mage: A massive aoe skill that freezes every mobs and greatly slow down boss in the area for 5 secs.

Rogue: A x3 shadow clone that immitates the users dmg and skill it uses.

I do think all warriors ult is good but here is a suggestion

War: Buffs allies and user Heath regen, bonus armor, and bonus dodge (ult like energizer and rogs ms ult)