I'm looking just at the willy fight as it shows me how you use your abilities. First off you're disease uptime is very low. Secondly you're averaging 18 seconds between Death Strikes which means you're sitting on your runes or using D runes for HSs either of which is bad. You want to keep one FU pair cycling constantly with deathstrikes and leave the other FU untouched so you always have a DS to pick yourself up with. and using your Blood pat at 10 stacks to bring back a DD pair for extra DSs. Heart strikes you want much in the same vein.
I'd consider dropping alot of avoidance into hit/exp especially reforging on pieces that are avoidance/mastery just to help out with your taunt swaps. Though given your current playstlye Mastery is considerably Devalued.