When they first appeared, stepping over walls, puddles and acid pools was my primary use case for spidertrons. It did require a pretty high APM to run a disco laser dance party with a squad of spiders and not lose any, but they had a decent expected lifetime regardless.
That's no longer possible, since they bog down and then suffer a slow yet inevitable death shortly after getting drenched.
So I've had to retire them to being used only as mobile roboports in distant poorly serviced places I don't want to spend 15 minutes traveling to.
Place to discuss the game balance, recipes, health, enemies mining etc.