Tristana is so stupid in URF
Stinger -> Stinger -> BF sword -> ZZ'rot -> BF sword -> BF sword -> finish BFs into Essence Reavers
Literally do nothing but push lane forever and tear down towers in 6 seconds. No point in completing items as all you need is raw AS and AD, since crit doesn't work on towers.
The best part is it works even better if you're losing, because they're further up on your side of the map so they have to use TP to defend (and you just W out when you see it)