Always interesting to min/max and look around for unusual builds.
With the new free past life feat you could make an interesting Turn Specialist.
Here it is:
Past Life: Cleric
You were a cleric in a past life. You occasionally feel the presence of the divine. Each time you acquire this feat you gain +1 to the DC's of your Conjuration spells, +1 Turn Undead attempt per rest, and you Turn Undead as if you were two levels higher. This feat can be stacked up to three times.
Also available are Feats:
* Extra Turning (requires the ability to Turn undead): allows the character to turn undead an additional 4 times per rest period. This feat can be taken only once.
* Improved Turning (requires Turn Undead): This feat gives clerics and paladins a better chance at turning the undead.
And Enhancements:
Cleric Improved Turning III: Grants an additional +1 to your level when attempting to turn undead (for +3 total)
Cleric Extra Turning IV: Grants an extra turn undead use per rest (for four extra total).
Additionally at some stages we should see prestige classes for clerics. Possibly one may give bonuses to Turn Undead.
And the wiki mentions:
* a Sacred item, adds +2 enhancement bonus to your cleric level.
* The spell Seek Eternal Rest will add a stackable +4 sacred bonus to your cleric level.
* The shield item Aegis of Flame adds 6 hit dice to those turned when equipped.
* Armor of Command adds a bonus to Charisma based checks, which might include Turning attempts.
A few questions:
Can the Feat Improved Turning be taken multiple times?
To get Past Life: Cleric three times does that mean you take a cleric to 20 and restart three times?
Is Turn Undead so broken that even Turning as if you were 14 levels higher wouldn't be very good?
What is the base number of Turns per day for a cleric?
(With gratitude to http://ddowiki.com/page/Turn_Undead )