Screw points in Channel, Mana Cloak ftw.
Tashiana is just not up enough for it to really make a difference in my opinon. Maybe if debuffed more than just mental it might make a difference. The only time I could really even see it benefiting is on mobs that AE and timing it so that Tashiana is up when the mob AE's and Spell Scourge hits harder. I just don't see enough benefit out of it, maybe if it was all magical damage and not just Mental. Quite frankly very few people in the raid are even going to notice you have it up.
As for Thoughtsnap, there aren't enough Mem Wiping mobs for it to make a difference, and a good tank is going to be able to deal with the mem wipes anyways. I also feel like I'm wasting 10 points in the lines because quite frankly in raids I really don't need faster casting or reuse on my stuns and no one has been able to show me a use of the dispel yet.
Coercive Healing besides the Line being really useful and increases personal and raid dps (with the extra deagro on HL) has the most tangable benefit out of all our end line AA choices. Even if you are in the OT group and only use a Cleric (like my guild), the extra Reactive trigger can be really nice. We often have a Templar solo heal the OT on pretty much every fight where you need an OT. If you have a shaman, 15% larger wards is huge. I've had other healers bitch at me because they are so bored with nothing to heal while the shamans wards never break.
Mana Ward is the middle one. I took the AA's to get it that you can always benefit from regardless if you have a bard in the group so that no matter how you look at it my Regen is as best as it can be. Mana Ward it self is fantastic for Mayong and Avatars. It is very easy to see the group that has a Coercer to the group that doesn't on those fights (and Matron and other power draining mobs if you take longer to kill them).
Just my 2 cents worth. Here is my spec for my coercer. I will typically do a little over 1k ZW in an EoF zone, though my gear could use a lot of work.
