Sen's pool is already so good, but the obvious two bad ones are Breeze and Ascent. Breeze may just be a perma ban from here on out, but Ascent is definitely fixable. I think adapting the PRX Ascent comp could actually be a sneaky way of turning a weakness into a strength because of how good SEN players are on specific agents.
The PRX comp went 3-2 with Monyet and features: Raze, Fade, Gekko, Omen and Viper
Here's why it can be so good.
TenZ can stay on Omen, his current best agent.
Zekken goes from Jett to Raze, an agent he is likely the best in the world at and is far more comfortable
SEN can put either John or Zellsis on Viper, their best agents and, in general, SEN is probably the best team ITW at utilizing viper (similar to FNC of last year)
The last spot can go a few ways
Sacy can play Fade or Gekko; IMO his fade is his best agent, so putting him on it makes the most sense to me
The biggest question mark with this idea is who plays Gekko, as both John and Zellsis aren't Gekko players. If they can, however, learn it in their next few weeks of practice, it could be a valuable agent for Zellsis to add to his kit.
The final comp is:
Zekken Raze
Zellsis Gekko
Sacy Fade
Tenz Omen
John Viper
If they play in a more up-tempo pace on this map, they could dominate with their already strong retake ability