This is a tough one
Mcleod - lost trust with the coaching staff as the playoffs went on, and isn't showing much improvement in his consistency and grit. Also probably the easiest player of any that the Oilers might move to dump without gaining any salary back. Really well liked in the room though.
Ceci - Got scratched once, but pretty consistently got his 2nd/3rd pair minutes right through to the end. Pretty important piece to the PK which may necessitate keeping him with VD gone, even surpassing Nurse in a role there.
Kulak - good playoff performer, but strictly used in a 3rd pairing role minutes wise, and basically isn't used on the PK at all(was shocked to see how little he actually played there). Moving him might allow an easier transition for Broberg instead of making the rookie play on his offside with a difficult to play with partner like Nurse.
I'm gonna go with Mcleod and Kulak. Kulak is an expensive luxury on the bottom pairing, and Mcleod might not have left the best impression on the new coaching staff