subject says it all, really
I'm still far away from the point where my monsters approach level 90, even though this is by design (prefer to have a large group at a manageable level). But then, at some point I'd like to know in which epics to invest, and as we had mostly simply "epic" requirements I guess I should think about ranking up two epics at least to rank 2.
I currently use Musu, which was very helpful in all kinds of survival dungeons because of shield and regeneration ability, and is probably a solid choice. During the recent race I discovered that I can end up with a lot of Dragonian Beasts, Rabidex, Rhynex and Griffex. Of those, Dragonian Beast would be my first choice because it has an AoE stun and two more stun moves. Both are very slow though. Any other breedable epics I should consider? Or should I consider the epic monster just as a "whatever" placeholder for team runes?