The cap is probably going to be around $84m.
Forwards: O'Reilly, Tarasenko, Schenn, Steen, Schwartz, Bozak, Perron, Sundqvist, Sanford, Barbashev, Thomas, Kyrou, Blais & MacEachern.
Defensemen: Pietrangelo, Faulk, Parayko, Dunn, Gunnarsson, Bortuzzo & Mikkola.
Goalies: Binnington & Husso.
The cap hit of the 19 players in bold is $70m.
So just trading Jake Allen gives us $14m to sign Pietrangelo ($9m?), Dunn ($3m?), Blais ($1.25m?) & MacEachern ($750k). We'll likely sign another goalie, but I'd guess he'll be in the $1m range as well, so it doesn't change too much.
If we're wanting to sign Scandella then Gunnarsson is probably getting moved out, so that frees up $1.75m. Then there would be another move to free up some more salary, which could easily be a hockey trade where we take a little less salary back. If we're wanting to go into the UFA market, then we'll probably need to move both Allen and Bozak.
Our cap situation is largely just moving Allen and then shuffling some things around to accommodate other moves we might want to make.