I'm torn between Wrangler and Southern Hospitality.
Wrangler can save your sentry from an uber'd Heavy onslaught while hit the regular schmucks behind them. Southern Hospitality is amazing at tracking disguised Spies. Oh what's this?? That Sniper is bleeding after running into my spiky wrench... SPY!
All it does is cause bleeding like the Shiv. Only difference is there's no damage reduction, but you don't get random crits and it makes you take more damage from fire.
Devious Comments
Wrangler can save your sentry from an uber'd Heavy onslaught while hit the regular schmucks behind them. Southern Hospitality is amazing at tracking disguised Spies. Oh what's this?? That Sniper is bleeding after running into my spiky wrench... SPY!
It makes defensive engineering so fun.