I think I have found one of the best end game builds out there. It involves utilizing Jaunt's low Turn cost for a lot of damage and it uses Void to stun enemies and debuff them making them easier to kill. It also utilizes a lot of the healing talents to make yourself really tanky. This build is very good even without the use of Turn.
Here you can see what the build looks like at level 30 (max level). I can use all the limiters and still defeat everything with ease.
The skills that are required for this build are:
Ping + Load + Purge
Jaunt + Breach (and maybe Tap. Tap is really good because it restores health)
Void + Crash
If you don't have some of the functions you can use something else. Although the other passives aren't required (Crash and Bounce) they add a considerable amount of survivability and should be taken if you have them.
Out of Turn
1. Void spam to stun and debuff.
2. Mask to gain the damage buff.
3. Ping everything down.
In Turn (if you can I like to Void debuff right before I enter turn.)
1. Ping (to put the purge debuff on them)
2. Jaunt. This usually heals me back up if I'm injured.