My friend was doing trash earlier and figured out that if you kill up to the phase-twisters CC one, kill the rest. Run out and run back in the same group of phase-twisters will be there. So this is more chance at epics with less effort.
1. Clear up until that last 2 groups of phase-twisters
2. CC(sap/sheep) one pull and kill the rest
3. Walk out, walk in(dont reset same group will be there spawned)
4. Rinse and repeat
Much easier and much faster
Have fun farming your epics