/MM is a great blaster powerset, arguably the best or one of the best depending on what you wanna do with your blaster.
/MM complements Ice/ very well due to more -rech debuff and very good AoEs.
Your main powers in /MM are Psychic Scream (great to use in conjunction with Frost Breath), Concentration (aka Build up), Drain Psyche (slot it with acc and heal to start with) and Psychic Shockwave.
World of Confusion is pretty much useless before 50, when you can slot it with a cheap Coercive Persuasion for the set bonuses.
Scare is not useful at all on your Ice/MM.
Subdual is great if you slot it : does as much dmg as Ice Bolt over time, and keep badies away from you. You can make an attack chain of Ice Bolt, Ice Blast, Bitter Ice Blast and Subdual with some recharge. Insert Freeze Ray when you need control. Anyway you cant miss this one 
Mind Probe can be useful if you want to blap a bit, especially it recharges really fast for a Blapper attack. TK thrust is not that bad, but not that good either : it takes a bit too long to animate when you really need it.
Good luck with your blaster 
Cool. Thanks.
Everything Ehina said is pretty much spot on. The only thing I have to add is that, with ice as your primary, you probably won't have much use for the melee powers due to the inherent slowing effects of nearly all your powers. Of course, that's assuming you are playing a non-crazy difficulty level. Have fun, good choice on the power-sets!
@Winter. Because I'm Winter. Period.
I am a blaster first, and an alt-oholic second.
Cool beans. I don't plan on getting any of the melee powers. I team regularly with the same people, so i won't have much use for getting close with a defenseless toon. So to speak.
The other thing that folks have neglected is:
Ice/MM has nearly as much hard and soft control as Ice/Ice but does a much better job on AoE. (Ice Storm, Frost Breath, Psi Scream).
If you take Ice as your Epic, slot some defense set bonuses, and maximize the end mod in DP you can self herd a large enough group to avoid the end crash when you use blizzard.
If you missed a mob and are just under avoiding the end crash you can pop Geas if that will take you up over the threshold and if not you can pop a blue, hibernate, and wait it out.
-Insanity is doing the same thing over and over again and expecting different results. - Albert Einstein.
-I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use. - Galileo Galilei
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I'm not a full-on expert with Drain Psyche yet, but my experience is this:
You don't need to slot for End Mod- for each person you hit, that's about a Speed Boost worth of extra endurance. HOWEVER this ridiculous, over-the-cap, can't-burn-it-fast-enough level of Endurance does make one Stupid Blaster Trick viable. If you slot for 95% End Mod, and you hit 6+ people, you can nuke and start getting endurance back immediately, because you will have more than 1000% End Recovery.
It's a hard thing to pull off, because mostly when I hit 6 or 7 people the nuke isn't up, and if the nuke's up than BU/Aim aren't up, and if everything's up I only hit 3 people with Drain Psyche. Or I hit 7 people and the spawn's half dead by the time I realize it.
But it's a total Personal Victory Point when I get it to work.
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So you think you're a hero, huh.
@Boltcutter in game.
I usually play scrappers, tanks and trollers. Last night i made an Ice/Mental blaster. Any thoughts or tips for the /Mental part? I pretty much know Ice.