le Redoutable
Ich bin El Glouglou :)
while clerics fight off, priests follow ...Diabolist is a follower of devils.
Infernal is also a typical adjective in D&D for things related to devils.
Are you talking about the name of a cleric specialized in countering/fighting devils?

tiens! the Divine Path
10 either Healer , or Demon ( i dunno, I too far away to identify )
9 Priest
8 Cleric
7 Paladin
6 Warlord
5 Cavalier
4 lord ( like in English Lord )
3 drunkard
2 peasant
1 coward