Sabers: If Vitiate can't rely on his offensive Force powers he won't be of much help and won't last long in a duel, Team 1.
Force: Without sabers Kun and Krayt are at a disadvantage, and much less able to deal with Vitiate's powers, against Vitiate alone they will struggle, with Malgus they'll fall. Team 2 me thinks.
All-Out: I'm not convinced Krayt (or Kun) could put up a fight against Vitiate if Revan can't, certainly not the time necessary to defeat Malgus. There is also the nexus to take into account which will likely amplify Vitiate the most. Team 2 wins.
Sabers: Team 1, noshit.
Force: Vitiate > Kun and Malgus > Krayt in terms of TK and lightning.
Overall: Malgus vs Krayt would be a good fight with the latter eventually winning due to Dark Transfer. Kun vs Vitiate is probably Vitiate's game since his defenses are excellent and his lightning and TP are both OP. I feel that he can force a Force duel and win. Overall probably team 2, Swtor Vitiate would make it sure imo.
Back to the topic I think the team has a fair shot. Malgus loses to either in a duel, and with the nexus amp he gets destroyed fairly rapidly by either Kun's blasts/drain or Krayt outs him with drain as well.
Krayt's tutaminus/drain would be troublesome to Vitiate as well, and he has TP resistance to ward off any attack from Vitiate. Either of them can hold off Vitiate with their force abilities, and literally destroy him if they can close the distance. Vitiate's lightning can be absorbed by Krayt's tutaminus/deflected or blocked by barrier from any of the Dark lords, so its not really helping him in any sense at all
The nexus argument is blurry imo. We don't know how it effected Revan. And unlike most people here, I don't think completely disregarding a feat cause it happened on a nexus is a very logical approach. I agree it makes it less impressive though.
Kun's blasts failed to kill an opponent inferior to Vitiate where Vitty overwhelmed an opponent(who probably has better tutaminis than Kun since I still haven't seen any feats presented by anyone) with a single lightning attack. Not sure how they are comparable.
Doesn't he say that prior to the fight? In that specific moment, he uses the dark side as well.
Besides, nexus amp doesn't necessarily shorten the charging time but the power Vitiate can build up in that period of time. Since Kun is inferior to Revan in this regard, Vitiate will have an easier time with him which will make up for the absence of a nexus amp.