If you're using 3.5 DR, you might be interested in the Sense Weakness feat, which has done well for my (admittedly non-epic) dwarven Dervish -- it's in the Draconomicon, and essentially allows you to ignore 5 points' worth of all sorts of DR or hardness. It does require Weapon Focus, though...
Considering that one of your favored enemies is dragons and it seems like you like flavor, you might look into the Dragonstalker prestige class, from the same book, if your GM does dragons relatively often. A lot of its stuff applies to dragons, but some of the other stuff might apply equally well to, oh, say, lycanthropes -- especially the "Ignore Natural Armor" and "Hide Scent" class abilities.
You might try to arrange it so that your character's specialty is less battle itself than it is the ability to choose and set up the battle to the party's advantage -- you are a skill-using character, after all. And if you can get yourself some ranks of Use Magic Device with those rogue levels, you can get a Wand of Silent Image and start doing interesting things like creating an illusion of a wall through which your opponents can't see you, but your party has line of sight toward them because you've told them ahead of time that it's an illusion...