>>531309075
It's really not that hard.
>No Medics
Poison map.
>No Snipers
Drone map.
>No Defenders
Truck map.
>No Vanguards
No DP gen map.

It'd be much easier to hand curate a list of niche maps and make a point system. Certain operator types give points for certain maps and whichever map has the least points gets picked.