Trading yak makes no sense right now. The return would be pretty useless.
maroon McDavid yak
This combo should be tried to start the year. Opposing teams will likely matchup thier best d against McDavid regardless of his linemates, and this line should still be able to produce.
That would leave
Hall draisaitl kassian/pak
Pouliot rnh eberle
These combos have had success in the past. One of these lines goes up against bottom pairing D.
maroon McDavid yak
This combo should be tried to start the year. Opposing teams will likely matchup thier best d against McDavid regardless of his linemates, and this line should still be able to produce.
That would leave
Hall draisaitl kassian/pak
Pouliot rnh eberle
These combos have had success in the past. One of these lines goes up against bottom pairing D.