Which maps would be best for this mission? I can add some if you think they'd be useful.

The mission can be moved to any map simply by renaming the pbo. You can get the pbos from the zip file mentioned above.

Or if you're more tech savy, You can get the pbo from your steam directory. For me it's in steamapps\workshop\content\107410\3444387114. There is a file that for me is named 15665958599052821846_legacy.bin (for me). You can setup a symbolic link from this file to your steam Arma MPMissions directory and name the file ImpasseTW.MapName.pbo where 'MapName' is the name the game uses for that map.

i have a question
will you do any more of the optrebuchet maps like harvest, arcadia ,ext for this mode