Black beast is actually designed just that way. Hopefully new mythic will get same buff Black beast received.
Try Vash with theif hero class and summons. I haven’t tried with hierophant class yet.
I have had a very long run of 3t as they come wins with this. Use Lep to fill Crusher/Vash. Use Vash on Lep asap. Reroll devouring the spawned troops. I do not use spawned troops. Titan is a must and upgraded Crusher to at least vi.
Vash Dagon + EoE cough cough.
I run a PVP team with Vash and it works pretty well:
The Great Maw
Obsidius or TPK
Obviously do the Great Maw devour, then devour him