I'm deeply in doubt.
Archivist 5 + Divine Oracle 2 + Fiendbinder 10 + Contemplative 1 (thus 2 domains)
or
Cloistered Cleric 5 (may be Divine Magician ACF) + Malconvoker 3 (may be also Divine Oracle 2) + Fiendbinder 10 + Contemplative 0/1 (so till 5 domains and rebuke and knowledge)
All for a evil side divine caster / demon summoner.
Archivist is really flavour and much researcher well set with fiendbinder (and truenaming)... but getting only enormous spell list (granted you find them) and Dark Knowledge against domains (a lot), rebuking, knowledge did not look like something worth.
any advice for the best performing solution?