The problem with increasing the MP level for you, is that you have very very low AR. Even if you keep everything frozen, you won't be able to take too many hits.
You are running a CM/WW build so what you need to do first is understand what makes the build work well... and that is, IAS and CC. You are currently sitting on 2.474 APS and 40.5 CC. Get your APS to at least 2.51 and your CC to at least 50. That will at least get your build working more ideally. The next APS break point you can try to reach is 2.73, but just get your build working first.
After that, look at getting more AR anywhere you can.
What is your budget? For around 1m, you can fix up your APS/CC issues but you'll have low AR/armor (but probably better than you have now).
Check out the budget CM/WW guide here: http://us.battle.net/d3/en/forum/topic/9628662863
If you have 10m+, take a look at PieHole's SNS guide for more detailed information about this build here: http://us.battle.net/d3/en/forum/topic/8728753771
He also has a video tutorial which runs for about 90 minutes but is pretty comprehensive on gearing advice.
Hope that helps.