Gem selection--Zerker
If you are going to diversify your dps stats, make your gems (or at least gem sockets) the items with crit damage and change your head/chest/legs armor to something with survivability (I like Power/Toughness/Vitality). Crit damage as a stat is much more efficient in runes/jewels than it is elsewhere.
Example of what I’m talking about so you can do your own math:
On a headpiece, stats are 45/32/32. If you go crit damage secondary, you only get 2% (instead of 32 in another stat). This crit damage is valued at 16 points → 1%
On gloves, shoulders, and boots, the stats are 34/24/24. You still get 2% crit as secondary. Here, 12 points buys you 1%.
On jewels, stats are 25/15/15. Crit damage is 3%. 1% of crit only ‘costs’ 5 of another stat.