Northerns for aggressivness and local adaptation - it does get cold up there.
F-1s for size potential. There are some other potential tricks but they carry risk.
IMO in your location the northern LMB at 2X the LMB with Fla genes is the best mix for your goal. Too cold for Flas to reach their potential
so in colder climate the target is to get LMB with 20-30% FL Genes and heavier genes form the native. 50% FL genes will not thrive well?
