Friendly must be a good luck charm, Malistaire finally dropped his best-in-game ice robe for me last night, and his buddy the ice elephant dropped a matching ring. Along with my dagger the fire elephant dropped first time through I'm finally over 3K health, 20% resistance across the board and up to 80% chance on power pips. (They're spell power that counts double for spells in your own school.)
I'm really lucky to get Malistaire's robe on only the second try. gazerwolf, we can keep trying for your Death robe, at least until the new update comes out and he's impossible to beat.