My ideal defense core would be:
Klefbom-XXXX
Nurse-XXXX
Jones-Benning
Trade: Larsson, Sekera, Russell, Manning
You trade those guys, that opens up a lot ($15.92m freed or going to better use). Get rid of two extra LD's that are not necessary (yeah, I know Russell *can* play the right side, but still). Trade a black hole offensively (Larsson).
Larsson for Kadri
#8+Sekera for Spurgeon (almost guaranteed to sign with his hometown team, 5yrs $6.5m)
Russell + 4th for Colorado 2019 3rd round pick
Manning --> buried
Net result:
Draisaitl(8.5)-McDavid(12.5)-Kassian(1.95)
RNH(6)-Kadri(4.5)-Pulj(1)
Benson(.808)-Gagner(3.15)-Yamamoto(.894)
Lucic(6)-Brodziak(1.15)-XXXX
Cave(.675)
XXXX
Klefbom(4.17)-Spurgeon (5.2)
Nurse(3.2)-XXXX
Jones(.72)-Benning(1.9)
XXXX
Koskinen(4.5)
XXXX
Cap hit: $66.817m
Cap Ceiling: $83m
Cap Space: $16.183m
Spots to fill: 4th liner (x2), 2nd pair RD (Bouchard? Bear?), depth d (Persson?), starter/backup goalie (Lehner, Mrazek, McElhinney). That's do-able with bonus cap space available. If Bouchard doesn't work for some, then target a guy like Anton Stralman.
Bonus points for finding a taker for Lucic.
Note: Spurgeon trade I foresee people having an issue with. If you see a team that has ample RD or a RD that actually has term left and could use a LD that has a big cap hit and little value then feel free to use that trade instead of mine. Mine is just an example of a trade that *could* work.