I use these abilities when I want to DD:

You need your 3 abilities that cost 0 points to build TP.
Invigorate (preferably 2) to help build TP
Keen Flurry is a must if you want to use your victimize a second time fast
Victimize 2 is a must ability
Fleet of foot for evade.
All of your 3 counters.
As many buffs as you can (Sentinel and Defender 2 are sweet).
If you want a second Weapon skill go for Seismic Shock when youre dealing with a large group of enemies or Concussive Blow for a single enemy.
Bloodbath 2 and second wind 2 are must.