Quoting: Bolts20Cup
Honestly every Player you named goes before Cermak
Cirelli - large return, hard replacement cost
Colton - medium return, medium replacement cost
Foote - small return, easy replacement
Cernak - big return, medium replacement cost
Sergachev - big return, medium replacement cost
Honestly, I don’t know Lightning as well as you fans, so I am just guessing here. But selling Serg or Cernak this off-season for big return could be savvy move. Considering the demand for centers these days, Cirelli could also bring back large package, but it would seem he would be much harder to replace.