Under consideration:
Dazing spell, can start with snapdragon fireworks and flaming sphere, until I finally get to fireball. It's a little bit annoying for the game; in fact GM banned the rod, but is permitting the feat. He focuses on BF control, this can be very useful, but maybe I should skip something so likely to annoy.
Quicken spell, a bit early, but quickened true strike follow by black tentacle or telekinesis for CMB (or similar spells like hydraulic torrent). But really quickened mirror image and create pit seem much more useful, but won't come online for a number of levels.
Persistent spell, I have a rod of lesser, but I can never use too many persistent spells.
Other thoughts?
I have Craft Wonderous Item, and given the limited downtime in our game I don't see the value in taking another crafting feat; though craft rod is tempting.
Thanks!
