What to chose to be useful?

[Os1ris09]

So I know Clerics are over-powered if optimized right. I also know that my group isn't about power gaming. So what I'm looking for here is some help from the playground in good choices that aren't game breaking.

The following is my build and I want to be a battle-field controller/debuffer for the party. Also the party looks to me for healing.

Aasimar
C-Cleric 1 / Warlock 1 / C-Cleric 2 / Warlock 1 / Elritch Disciple 4

I already have the ability to use my EB to heal so that helps the healing role.

So what good invocations and cleric spells would be handy to have for the purpose i want to be in my party?

[Maginomicon]

Sha'ir (from Dragon Compendium). It is by far the most versatile caster in the entire game. If your sole concern is versatility, the Sha'ir is easily your best bet (http://www.giantitp.com/forums/showpost.php?p=15202614&postcount=34).

If not that, Spirit Shaman. Spirit Shamans get spell access as a druid (that is to say, all druid spells), but the spontaneous casting of a sorcerer (kind-of), so you can lay down debuffs and BCs repeatedly all day long.

[Os1ris09]

Sha'ir (from Dragon Compendium). It is by far the most versatile caster in the entire game. If your sole concern is versatility, the Sha'ir is easily your best bet (http://www.giantitp.com/forums/showpost.php?p=15202614&postcount=34).

If not that, Spirit Shaman. Spirit Shamans get spell access as a druid (that is to say, all druid spells), but the spontaneous casting of a sorcerer (kind-of), so you can lay down debuffs and BCs repeatedly all day long.

I want to stay with the current build. I want to be an eldritch disciple but I want to be able to be a battlefield controller/debuffer as those classes.

Are they any invocations or cleric spells that the playground recommends?