Well tbh i really don't see much profit in 10% rake dmg> stats on 378 offset gear and from my logs it ticks less than rip and 2ce less ticks during standard 5min+ encounter droping to about 12% our overal dmg or might go to like 15% if you stacked mastery and not hit/exp caped and miss a lot Shreds/melee. Also depends a lot of your gear i felt fine with around 7% hit and 15 expertize when i was using 2t11+2t12 and was able to keep mastery at 16=50% bleeds with haste just 20rating over for matrix proc. But still proc is tricky i had 30% uptime of 1624 crit rating on baleroc coz of EotC procs right b4 matrix QQ so now i can only w8 and hope for hungerer to disable that part of rng and get haste proc always :P
And Zheryn you can but you would like to drop some of your hit/exp especially coz you won't miss too much or get dodged/parried attacks, and drop mastery also than it should be fine. Also you can switch hands enchant for 50 exp. And i think your investing VPs in wrong parts hoping for BH drops since ring+relic is 1950VPs just a bit more and you could have bought legs and get nearer to 4t12 since you have shoulders already, but that's just personal i personally bought tier 1st coz no luck in BH with drops.
Tip: grab Martix if you can its damn good trink with insane uptime