I finally got back into this (after watching people play FTL ironically enough) and ho-lee-stuff, I just encountered the most annoying vehicle in the universe: a cloaking Helix with mounted leecher turret, leecher turret launchers, and point defense
it just shoots out leecher turrets all over the place that sap your reactor power until you've got nothing left so you can't use your beams to keep its cloak from recharging so it can flee, if you get too close it'll shoot you with its on-board leecher turret and shoot down any missiles you try to throw at it with point defense
fortunately I just unlocked the Pelican which has like 6 missile bays and a beam slot so I could just run up to it, take down the cloak really quick before my reactor gets drained, then lauch so many missiles there was no way the point defense could get them all
I probably spent a good 5-10 minutes just fighting this one ship regardless though, mother of forget
GOOD LORD THEY'RE ALL OVER THIS SYSTEM