There are lots of ways to "play" CM...from a keybinding point of view. The others are correct in a sense...there should not be that many elite affixes firing off if you're playing CM optimally. Personally, I have WW on LMouse and Teleport on RMouse. I have Frost Nova, Diamond Shards, and Exp Blast bound to 1,2,3....with "stand still" set on TAB (so its comfortable). When I approach a pack I hold down the LMouse to continuously spam WW's.....and continuously hit 1 and 2 until things get rolling (maybe 2-3 seconds) then start hitting 1,2,and 3. Not hitting 123 to begin with saves some AP from not casting Exp Blast and lets you get out a few extra WW's (to generate more procs and more AP)....and that gets the cycle going.
Now, its acually a lie when I say that I hit 1,2,3 or any of those keys....I have a macro on my mouse that does it for me! But, soemtimes my macro dies out and I have to manually do it. Yeah, you hand and fingers can get tired....but depending on your keyboard, if you can keep your keypress length to a minimum (i.e. not slamming 123 up and down an inch away from the keys like a madman!!) then I think you'll be alright.
The problem is that most keyboards will not send 1,2, and 3 if you just hold down all 3 keys at the same time. It just sends one of them. Gaming keyboards will send all three keys if you hold all thee down at the same time. So, a gaming keyboard would be another solution if you didn't want to use a mouse macro. Also, if your familiar with autohotkey, you can write a macro for your keyboard that will send 123 for you.
But, yeah, if you're not getting your maximum number of WW out there....and not spamming Diamond Shards and Frost nova....then, things aren't going to work in conjunction with each other....and your survivability won't be maximized.
If you want to see the build in action, check out my video here. At 18:00 I do a run though the Fields of Misery in A3. This is what a run as SNS should look like:
For example, the key warden in A3 is a PAIN because I can't permafreeze it and it teleports all over the place.
Oh, don't feel bad about this. They buffed him so he ignores CC (crowd control, i.e. Frost Nova) and is actually a difficult enemy to freeze and defeat. So, yeah, he's tough to freeze.