I look at that picture and all I see is a massive friendly fire incident waiting to happen. What kind of settings are you using to avoid that?
On topic, I propose a new type of vehicle part, essentially a gasoline sprayer oriented upwards with a steel grate over top that acts as an AISLE. When activated it creates a contained fire that will ignite and cause burn damage to anything walking through it’s tile(note, not items on the ground, presumably below the flames). I suppose these could be used as portable cook fires too. Breaking it would spread gasoline and/or flames. I envision a square of these surrounding quarterpanels with me and a crew of NPC’s plinking away.
Also, is there any chance of filling moats with things other than water? An acid moat would be awesome!