Replay function send based around core wire... So use SS for at least some of the core wire... Don't think it needs to be all though.
Interestingly enough though you can use a different material for core wire(N80,N90,etc)and SS other wrap, and while replay doesn't work... Temp control will!
I've been using N80 cores with SS wrap and then running in temp control with material set to SS316, and TC works flawlessly! Alternatively, SS cores and N80 wrap works with both replay and TC-SS.
Running framed staple aliens in my Themis now with all N80 core with 34g SS wrap and use both TC and wattage with great success... No replay;though, I haven't tried it on my Replay PK profile to see if it works with that.