I'm going to shift the focus a little bit. What's the most underused pilot tool so far in the patch? I'm not asking "What is the most useless", but maybe both answers are one and the same?
Impact Bumpers. I haven't seen too many of these lately. I use to use them right before a ram to reduce recoil damage, but turns out it's better to pop moonshine right before impact to keep the ship straight.
Vent Chute. It's not underused, but it's not overused either. Most people use hydro instead. I guess better to go up than down.
Drogue Chute. Some experienced pilots take it to counter carronades, but it really takes out piloting from the game when a parachute just stops the ship.
Tar. Tar is and has been broken. Some might argue otherwise, but the truth is, you don't often see tar clouds anymore. Destroying your engine is probably not the preferred way to escape.
The Range Finder... For those of you who don't know, Range Finder is actually a pilot tool. For those of you who still don't know, Range Finder is a tool in the game. You never see Range Finder. In fact, its not even listed in the gameplay page.
You can check it right now:
http://gunsoficarus.com/gameplay/classes/captain/I think the typical tools are moonshine/kero - claw - hydro.