Don't forget you can get
Prime Symbiosis from Seyan Ebonlocke in HoS to regen some mana as well. I've seen 80 mages soloing in the gyrospires once they broke 1k AA and this let them keep at it without a mind buff.
At your level you'd want Seer's/Voice of Cognizance or Prescience/Voice of Prescience from a chanter. As long as tanking is not high on your to-do list, go for Ironwood or Heartwood skin from a 77 or 82 druid, they add mana regen and a number of HP but less AC than Temerity/Gallantry. You'll also, at your level, want some of the new SoD clickies. I believe the
Band of Unity from Ulgren Vith in Toskirakk has a clicky effect which is along the line of the Beastlord spells and, if so, saves you from seeking those for rebuffs.
For mana pool enhancements, not sure if it'll stack with chanter buffs or not, but try to get an SoD belt from Kurn's Tower, Kaesora Library, Korascian Warrens, etc. The effect you're looking for is Maelin's Meditation which adds 400 mana to your pool. You can also get together a good group and go kill Hulcror in Wall of Slaughter for a clicky doll with Maelin's on it. Not sure what's harder for you, SoD mobs or OoW raid mobs, lol. I've 1-grouped Hulcror but it's easier for the same group to hunt named mobs in SoD. *shrug*