Diabolist would be so much better if he granted preferred enemy to the unit he joins...
Sure but that would seem not entirely fluffy as suddenly he would be babysitting heavy support squads and such... Besides that would make him quite useless in his dedicated Rite, the Dark Brethren where every IC gets full Preferred Enemy and this RoW is already far from being top tier.
Honestly, Id say Diabolist is already pretty good rulewise. For 35 pts you get Fear (5pts), 5++ (10 pts) and a melee buff similar to Chaplain: if you are hitting and wounding on 4+, it's around 10% worse output than Hatred BUT it's better if you are hitting or wounding on 3s or better and unlike Chap's aura it works every single turn.
I'd wager that he'd be more popular if we could take him as 'Charismatic Leadership' HQ instead of Centurion or Chaplain.
edit: Wait a second, does he not confer it to his unit at all, even in close combat? sorry, I got confused
Edited by Lautrec the Embraced, 18 April 2021 - 03:13 PM.