Hydro Turrets
I play with Tarrs on. Anybody else enjoy setting up hydro turrets (all types) in Tarr-prone areas away from the Conservatory? I love how efficient they are. Impossible Sky area in the Grey Labyrinth is a fun place for them. I have a bunch set up in the honey slime area in Starlight Strand, too. I'm plenty far enough along in the game that Tarrs can't get me; it's just satisfying seeing them get zapped so efficiently.
Just a fun late game thing.