Dungeonscape, but it's not really necessary, just handy. A level of Psychic Warrior and 8 levels of<del>Illithid</del>Slayer from the Expanded Psi Handbook/SRD would make an interesting warrior-gish with a focus on grappling, and you'd have the casting of a 10th level telepath to back you up, or just straight Slayer if Sahariel doesn't mind you having PsyWarrior manifesting instead of Telepath manifesting. Augmented Expansion+Grip of Iron+other buff powers = 1 heck of a nasty grappler.