mang song / enigma / ars baalos / magefist / arachs / cta swap / torch / anni / renewed fire sunder / skillers, either rare boots or wraithstep
then for 75 vs 125 builds, cheap vs expensive
2/20 or 3/20 circlet or hellwardens / 2/15+ ammy / 2x opalvein or resist rings
vs
flickering flame / maras / fcr ring / soj or bk or dwarf

20 blood boil 20 blood oath 20 engorge 20 bind demon, 1 lethargy 1 siphon 1 consume, rest into demonic mastery

either infinity merc with bound holy freeze+cursed demon, or insight merc with bound conviction+cursed demon

Awesome build, so it's all about the big bound demon and blood boiling everything around him, are you still using an urdar? So you spam the crap outta blood boil then feed the demon with some engorge, amp + conviction both pushing the damage of blood boil