When I think of a conquest-like gamemode for this mod, I see something akin to the Verdun gamemode where there are several trenches (maybe 5-10) in relatively short succession, each capture-able, and both sides have infinite respawns. Each team has to capture as many trenches as possible before the time runs out. Considering the scale of this mod and the capabilities of the players, I think that would be more viable than using the full-blown No-Man's Land trench maps people usually envision for conquest, where each attacking party would get shredded while attempting to cross all that terrain.