Right now the only skills "really" needed for endgame tanking, or let's not say needed, but useful are...

Shield: Aegis Boon 2, Deflection, Wardrum, Outmaneuver
Sword: Provoke 2, Obsess 2, Rampart 2, Phalanx 2(IMPORTANT), Sentinel, and then Incap WSs.

Other useful stuff...

Marauder: Warmonger, Defender 2, Intimidation Mark Trait
Pugilist: Prime Conditioning Mark Trait
Conjurer: Cure 3, Profundity 2(its nice for hate with low stamina cost), Fast Cast Mark Trait
Thaumaturge: Emulate(my THM is only 32, since I want to get my CON to 50 first, but Emulate just rocks)
LNC/ARC: The Attack buff skills, cause any type of buff generates a lot of hate and Ferocity and Raging Strike dont take any Stamina.