I can't say this enough....
ICE/ICE
I'm like the only one on my server, and it's incredible how good it is.
First, I rolled a StJ/Shield, very impressive character, DMG was superb, I had one gripe. CLICK MEZ is for the birds. I rerolled after like vet level 20 and never looked back. Ice Melees DMG is on par if not slightly less than StJ and I have ICE PATCH. The weakest power in IM was removed for AS(GIS), and Ice Armor is just too impressive with Icy Bastion up in 60 secs with global rech procs and 3 rech enh, it boost survivability by adding to regen, recovery, and resistance and is truly an amazing power, much better than hibernate. I really suggest you give Ice/Ice a try, you won't be disappointed.
edit: I forgot to add, frozen aura and frost are amazing AoE powers.