My paladin burns through mana way faster than my DPS. It has been getting worse as his gear improves. He takes less dmg, needs less heals, and less mana is restored during combat. I compensated for that by putting lower rank tanking spells in. You'll have to fine tune your spell ranks so that your dps isn't pulling agro, and mana is getting conserved, just try:

/castrandom Holy Shield(Rank1),Consencration(Rank1),Cleanse,Exorcis m(Rank1),Hammer of Wrath(Rank1),etc

to start, and then adjust ranks if you're pulling agro.


Don't forget to make another button (or adjust this one) with full ranks for when you're raid tanking or actually going up against something that will smack you around and you get plenty of mana from heals.

In addition, if threat is still not an issue, use Seal of Wisdom.

Anymore I start the battle with seal of wisdom, full rank avengers shield, then drop a full rank consecration. From there i just mash my down-ranked castrandom tanking macro. My paladin has 450 spell dmg though.