Honestly I feel like Chet hasn't had the impact this season as in seasons past, so he might be the most likely, Its hard to say who from the optic core would be dropped because
Crashies is still a really good initiator and his comms are the best on the team
Victor while inconsistent has been a really good flex over the years, I'd take him on Raze over Demon1 anyday of the week
Marved who also just came back to the team is an elite controller when he needs to be, he's called Iceman for a reason.
The problem if they dropped one of the Crashies/Victor duo it would likely mean the other would want to go as well and could lead to problems on the team, but theres plenty of other T2 players that can play their roles to a high level, as opposed to with Marved where most current controller players are not at his level.
Thing is the best of NA T2 are the likely contender challenger teams like M80, MXS, OXG, so getting players like Zander, Brawk, Verno, Vic, BCJ, Bdog, Nismo, Dapr; wouldn't be the most sensible from likely some of those players perspective when they can stick with their cores and likely get deep into ascension.
I honestly think if they did make a move though we'd likely need to get an ACTUAL IGL, Similar to SEN of last year, NRGs lack of an experienced IGL once Dephh was removed it showed when they brought Marved in.