I didn't buy them when they came out, but I'm going to pick up two boxes and enough blisters for two full units. The upcoming Shattered Grounds league has given me reason that I cannot ignore! MAT 10 P&S 15 with Reach if I fight them in pairs and have my Warchief in sight. Not too shabby.
Then whatever my Warlock at the time might be able to add in---
Maybe go with Rhyas to keep it simple? (Ignore Free Strikes, extra attack on Feat turn)
Absylonia for an upkeepable +2 on attacks vs Living models? (MAT 12 assassination charge?
pThag to raise their P&S to 17?
eThag for an additional die on both attack and damage?
pLylyth to lower enemy model/unit armor by 3, and add a die on attack rolls during Feat turn?
Ah, decisions, decisions!