Sorry to bother again, but I've made my Abadar cleric focus on summoning feats and gave him some good charisma for extra channels. Is there really anything else to grab on him other than more channels and summoning feats?
Don't need summoning feats on a cleric to begin with. Animate dead is the best summoning spell in the game and it doesn't benefit from any feats whatsoever. Don't remember if elemental swarm does, but it's for fodder either way. What you want as a cleric is heighten spell and evocation foci for archon's aura and blade barrier. Everything else is largely whatever you fancy.