Hey finally starting my tier 3 tune page, and I cant decide which marks and glyphs to stack. I'm stacking flat hp quints, and probably dodge seals(thoughts on this?).

At 30, I'm doing the usual early game jungling into ganking, if this helps with the choices. Any help would be appreciated.

Magic Pen marks are a no-brainer, as Amumu deals primarily magic damage.
For glyphs, magic resist or mp5/level or cdr are your best choices. If you decide to take dodge seals, I would highly recommend the mp5. Speaking of seals, dodge is a good choice if you don't mind the interference with Tantrum's cooldown. Otherwise, mp5/level (don't stack it on both glyphs and seals, pick one) or armor are your best bets.