:O Sounds like an excellent strategy Brevan!
And we are playing on Normal. I'm a Necro with Golem Focus. The other three are Paladin tank, Martial Arts Assassin, and Barbarian.
As I thought, there isn't much I can do besides cast AmpDmg or Decrepify. Even with Golem Mastery at 26 they can't hope to stand up for more than 3 seconds. I was re-casting Iron Golem whenever I could in hopes the thorns on it would do any kind of dmg to Mephisto.
Anyway, it sounds like with a decently geared tank, we can do it. I'll tell my friends and hopefully beat Mephisto with them soon. Thanks guys