I've got a level 29 ice/ma tank (Kandi Kaine - a very large nondenominational holiday fairy), and I really love it. MA is a little annoying because it gets its one AOE attack late, but when you get it, it is a great attack (don't have it yet on my ice/MA tank, but I've had it on scrapper and brute builds). Energy absorption is way cool. End was a bit of problem before I got it, but now life is good. For pool powers, I went with flight, hover, and combat jumping. I'll probably get some from the fighting pool later, but I'm not positive. I don't have icicles yet, mainly for end reasons, and chilling embrace seems to do fine all by itself. Look at Redlynne's SR/MA tank discussion
for some good thoughts on the various effects you get from the MA attacks. EBs can take a while to finish off, but I'm patient. And of course, soloing Lady Winter is a breeze.
Aesthetically, Homecoming gives you a lot of flexibility with minimal FX for the ice armor effects and a punch option for the rather silly looking crippling ice kick.