If Ranked BTB is going to stick around I think the best maps with gametype combinations are...
AsymmetricalGuillotine - 1 Flag - TS
Meander - Strongholds - TS
Port Authority - Strongholds - TS
Voyager - 1 Flag - TS
Symmetrical Crossbow - Assault - TS
Dead Heat - Assault - TS
Panic Attack - CTF - TS
Viking - CTF - TS
You seriously selected Dead Heat & Panic Attack over Echoes, Fracture, or Traffic Jam? Just... why?
Plus, I don't know how you leave Scavenger out of your Asymmetrical selection.
Scav is a fun map, but with two good teams it gets pretty stale.
I like echoes, fracture and traffic jam, but i definitely think viking, crossbow and panic attack fill those same roles in a more competitive way. That being said, there’s room for at least a couple of them.
Dead heat seems pretty meh to me, though.