I think that Tenser's was one of the reasons if not the de facto reason for going T5 in EK. Even with the CD increase, I don't foresee too great of a problem due to the sheer amount of spells wizards and sorcs get to work with (and the SLAs that they get that don't suffer the CD penalties from it). As a concession, maybe the Knight's Magic can have the Tenser's Transformation as one of the multi-selectors. That way you could choose between more DPS, more CC, or more melee/tankiness.