Earliest level to 3-Box epic?

[danaconda]

Subject pretty much says it all. I know I have some ways to go, but I would like to know when abouts I should do the epic with my 3-box combo? I have a Necro, Cleric, Beast combo. Current levels are 54 necro, 36 cleric (gotta catch him up quick), 47 beast.

Any insight would be greatly appreciated!  :P

[Eatbugs]

I wouldn't try it below 60 on each character.  The Beastlord will have to tank, (which is tough for a 50's BST) but the major problem is resists - you simply won't get far on a couple of the fights if you try to 3-box them in the 50's, due to resist problems. (The croc in the Swamp of No Hope would stun your Cleric far too often with his AE, for instance.)