Just going to game plan this out for ya, since you might not have gone through the trouble.
Going into 21-22. You got some guys to resign.
Igor's looking at 5-6 mil on a long term deal. That puts you at 60 mil cap hit. Lindgren is going to cost you another 2-3 for a bridge, around 4 for a long term deal. That puts you at 62. Pilut the same thing. You're at 64. Buchnevich will cost around 6 mil to keep. Now you're at 70 mil. Chytil has to be resigned, Howden has to be resigned, Gauthier has to be resigned. Collectively that puts you around 76-80 mil if you bridge em all. Now you bring up Huska or Wall to be your backup. You're at 81. Let's say cap is restored back around 85-86 mil so you have 5 mil cap room. If you don't sign Buch, you have about 10 mil cap room.
Now you have to resign Mika, Hertl, Kaapo, Kravtsov, and Fox. Mika will probably cost around 10 mil to resign, Hertl probably 8-10 mil and Fox around 7-10 mil to sign long term. and you're screwed. Your only 2 ways to legitimately cut cap at that point are Kreider and Trouba and both of them have NMC's. Even if you choose to not sign Buch and bridge Fox, and bridge all of your RFA's next season, you don't have the cap to keep Mika and Hertl....