Question about TIME BACK rage power

[Smash]

I couldn't describe it better, even better than griffs are specialize (Onslaught, Ironfist ) knights with circle attack, teleport them in the right place let them surround or just released circle attack, at the beginning of turn 2 use time back on knights then teleport them again and use once again circle attack with army of evil beholders, archers, elves, hunters (with telescope) it is working great.
Timeback give you a lot of tactic use while mage can leave without it is a must for warriors.