Originally posted by Darth Subjektsion might grab his saber hand den crush it or
Vader would just have engage someone in a saber duel to buy Sidious time to wtfpwn the other two with the force, then tag team the remaining one. I don't think any of these three can touch Anakin/Vader in sabers.
Kreia/Traya Lightning/Storms the shit out of his suit...
as far as sids goes
DE he WTFPWN the forsaken shit out them
Rotj not sure possibly goes dwn to traya+Nihilus combo force
ROTS he dies,from what is shown,he gets destroyed by the triumvirate
After thinking about it, the Emperor won't have to worry about Sion for two reasons; first, Anakin has demonstrated the skills necessary to occupy his attention if not outright kill him due to his psuedoinvincibility and second, Palpatine could crush him with the Force. So if he absolutely can't spare the split second it would take to manhandle Sion, Skywalker is more than capable to attack the Dark Lord. Moreover, Palpatine is also capable of disintegrating Nihilus', Traya's, and Sion's lightsabers. The problem is dealing with Traya and Nihilus simultaneously.