As far as the HD cap on vampirism goes, it'll be up to Zaer to make the final ruling, of course, but I'd probably lean towards keeping it for Vampire Lords, myself.  Partly because that's what the actual rules say, and partly because the generational control trick actually seems like something that would fit the fluff for a Vampire Lord quite well.<br/><br/>Revisiting an earlier topic that was briefly discussed, I actually think that Torahime might be a bit of a boss-killer as well.  Her main focuses in combat are high mobility and massive amounts of single-target damage, and as we've already seen, she is capable of taking out what were intended to be boss-level characters in one round. ^^; On the bright side, her chosen method of attack does at least leave several different options available for providing challenges for her.  Blocking teleportation, blocking line of sight, and/or being immune to the flat-footed condition are the three big ones that immediately come to mind, plus her own energy drain ability doesn't have any sort of immunity breaker attached to it, though she might wind up occasionally using it against energy-drain-immune foes anyway, purely for the Suggestion effect.