How would you build it? I want to afk and just gank shit

max bind demon
max demonic mastery
max blood oath
max defiler (really you want it to chain 5, but you can get a touch more damage out by maxing it)

optional
sigil
hex
blade warp
abyss

do you want 2x defilers out to chain 10?

I am debating going actual goatmen+demon or this

Yes IMO: A top tier demon + merc will screen clear with 2 defilers.

good demon with aura of choice - SEE: https://forums.d2jsp.org/topic.php?t=107926808 (i'd recommend spearwomen)
a2 might merc with weapon of choice
2 defiler unless you are ubering or something without multiple targets

can summoner/ blood boil buiild do ubbers efficiently?

how it works on p8 clears?

no



slower than any warlock actually casting spells