I can understand this stance. I have every heavy out on Nutaku so far (along with all the hybrid heavies except Grace). I've managed to awaken Bernice, Gellius, and Deine (and Diina is close). I've also wound up with three duplicates of Deine. I can't help but feel that is entirely too many heavies, given how I rarely make use of them.
Fortunately, I managed to pull Kikyo this morning, so now I've finally got a better healer than my Chydis which is nice (I mean, I have Liana, but she is really expensive. Not to mention Kikyo has better healing per second than Elyse). If only I hadn't used up most of my xp fodder the previous week on another unit.