Asylum…block the area the trains pass through and keep the fight between the drop gates and send one train through every 30 seconds(random side) and two every 60 seconds.This will make the danger a triple threat.(New meaning to roadkill or better yet railkill).
The train side might be a bit long but this could be interesting.
I’d go for something like the grenades on district, or the embar(??) on training grounds. The stairs near torque on district would be fun, one set of stairs each.
One of the top bits on exibit would be fun, but very likely to unbalanced spawns.
I figure while dodging bullets you’ll have fun dodging trains to.It will make it alot less boring then boxes or mid.