For the Tower is a 15th level gestalt, with a feat every level. 4 person dungeon crawl. Very few points to rest, and no leadership(and variants)/gate. Diplomacy doesn't work as normal, and I think the new DC's haven been kept secret.
Not sure of which spells to prepare/persist, possible feat selects. Wings of Cover, Wings of Flurry, Greater Dispel Magic(trapsmith) will be a apart of spells prepared.
Which maneuvers to have learned outside of Action Before Though,Moment of Perfect Mind, and Mindover body.
Decent totemist soulmelds outside of manticore belt. It will be bound to the totem chakra, with knowledge devotion with a few minor + Competence bonus items to skills, and maybe a persisted Hunter's eye for 6d6 sneak attack damage to add in case of spells running low.
A which vestige to bind. Tenebrous gets flicker, and turn/rebuke undead but between extra turning(s) the turn undead might not be that useful and flicker might be better in a wand. Dahlver-nah is another possible one, but due to low binder level, shield self would likely need a willing partner to tank the damage, though a summon might work. Malphas for the bird's eye viewing might help.