There is a spell in Complete Champion called Substitute Domain IIRC. it allows you to exchange your domains for other domains that your deity offers. So you may get the Earth and Water domains and the turning they offer. It is a second level spell.
As a first level spell, persisting true strike should work I think. The wording of the spell, taken with persist, is a bit confusing.
Other good spells include Expeditious Retreat, Detect Thoughts, Enlarge/Reduce Person, See Invisibility, Alter Self or any of the attribute boosting spells would be solid choices.
Something I personally have done was Persist Scholar's Touch (lvl 1 spell, RoD pg 167) and used it to read entire libraries in minutes. My knowledge checks were insane.
And I would try to get the spell Delay Death on your spell list. Its a 3rd level cleric spell, which is also on the Destiny domain spell list in Races of Destiny. It prevents death from occurring due to HP loss.