Yeah your right I'll try it out thanks for the opinion.

It kind of feels like a waste to spend the 3 mastery points for Crit damage (Lethality and Frenzy) when the most core items in the build don't provide much crit. Even with both Trinity and IE, you still only have 35% crit chance.

Though I guess you have to spend those somewhere, and there aren't many other choices for this Ez build. Perhaps 2 in Butcher, and one more in Fury? or maybe on one of the AP masteries (since his abilities all scale AP, and you're buying trinity anyway)
Just a suggestion though. It's a solid guide, overall