I don't see bears in your build, so a mana regen mojo will be much better than ZC reduction. Definitely choose a ruby for your MCK, it helps a ton for the low damage range (especially the black damage portion). At your current stats, a 12% Life from any piece will add >120 "Vit" worth of life. >60k life or near 65k life will be excellent.
Overall, excellent WD! We're proud of you.
Impking and pBeybq definitely know much about the WD. There's no need to split hair with words. Impking made that statement in reference to the world #18 ranking in CHC, which is quite pointless for WDs since none of our skills benefit from critical hits. pBeybq suggested +ave damage over CHC to the OP because the MCK can have really low damage rolls, and the OP has extremely high CHC as allowance to "trade off" for higher damage range. As far as random number goes, there will be a string of crits and a string of non-crits, so balancing with Ruby and +average damage stats will stabilize game play.
I'd just like to clarify that MP10 is all about having a balanced approach. If your WD has low (say 30% CHC), then please get near to 50%. If your WD has world ranking CHC, then the extra CHC can be swapped for stats that give higher returns (maybe 30% to elites, 50% CHD, as examples). To get >50% CHC, the WD is probably a 1-hander, so CHC is in abundance while other stats may be lacking. If your WD is on the Skorn path, CHC is the best counterpart to pair with CHD. It does not mean that Ruby or +Average damage or SoJ is weak, it simply means that having lower CHC will not bring out the full potential of the CHD Skorn.
Hope things are clear now.
Edited by PaulNg#6869 on 6/27/2013 5:06 AM PDT