BurningLed wrote:True that. Gunslinger + Frontier Justice + Mad NInjaneer skillz with a 'z' = The most goddamn annoying spawncamper on the planet.
I run with shotgun, pistol, and gunslinger more often than not. Regardless of map type or attack/defend, I'm the engineer that's playing aggressively. 225 health allows you to soak a surprising amount of punishment, and I tend to prioritize getting the teleporter and dispenser up before anything else. Mini sentries are nice, but I'd rather save the 100 metal until I don't have something better to spend it on - shotgun and pistol do just fine as long as your aim is good.
If I'm playing defensively, I move my turret constantly and always place it somewhere unexpected - typically in a blind corner people tend to miss, or on top of a roof that can't be reached without a trick jump (build dispenser, jump, build teleporter exit on top of roof, take teleporter, setup turret.) I don't use Wrangler because none of my sentry positions are particularly useful for it.
Nesting as an engineer is a recipe for disaster. It takes one competent demoman to ruin 2 minutes worth of work, or one spy during a heavy or pyro uber. They added in the ability to move buildings for a very damn good reason.