Profane Lifeleech

[JellyPooga]

Now I know that this feat (from Libris Mortis) is not the best in the world...especially when you get past about level 5 and 1d6 damage is all but insignificant...but ever since I first saw it I fell in love with it. Unfortunately, I've yet to actually use it because (well, mainly because I've yet to play a Cleric in a game, but that's beside the point) Feats are such a rare commodity.

So, my challenge is this; find a place for this Feat of (not so much) Doom. Further, some suggestions for a character built thematically around the idea of draining health/vitality would be appreciated.

My initial thought was the Master of Shrouds PrC...sure you lose a level of Spellcasting, but you get Extra Turning as a bonus Feat (combined with the Undeath Domain gives you +8 Rebuke attempts per day) and a specialised Summon Undead. It also has very easy entry qualifications (I believe that you can take your 1st level of MoS at level 4 or 5).

Are there any Feats or Class Abilities that expand the range or damage of Su Abilities, 'cos they could apply to Profane Lifeleech?

[SurlySeraph]

Tome of Magic has various metamgic feats that you can apply to supernatural abilities 1/day, though it doesn't have maximize.

[Staven]

Seems like some of mama's good ol' homebrew spif-up-the-feat is in order.