Honestly, CWE allies is always welcomed, top DE list will most likely be Black Heart with either Coven or Cult and CWE for powers/shiny spears, and maybe 1 unit of Dark Reapers, they are still very good even with the point increase, double shooting them is still removes whole squads.
In high end game play its all about maximum damage turns 1-2, clean up on turn 3, and turn 4 objectives (tho turn 3 also tried depending on time).
Having units like Talos and Shiny spears in combat turn 2 with quickening, fire and fade, then Doom, with 3 Ravagers, 3 RWJF's pumping out damage is going to be killer.
Cult would do Reavers moreso for tie ups (against Gman lines and IG tanks) with Wyches having Shardnets to keep things tied up (against Tau, Chaos, CSM gun lines).