I'm with Dusty here. Bottlenoses give me nightmares. Stoat killed me in only a half-dozen passes or so, and that was while he was fighting off a Scorpion and a Wraith in addition to my Bergelmir. That said, a bad pilot in one of those is just asking to die- but it's pretty similar to putting a bad pilot in an Agama and asking him to fight a Lynx. The ship is excellent, you just need to use it's agility rather than simple brute force.
I've no proper experiences with the Orca this mod version, so I can't comment there. It seems like it's supposed to be the GB-hunter while the Bottlenose is the fighter-slayer, though.
Mjolnir's description of the Thresher is spot on from my flying experiences. Nothing scares me more in that ship than a Resheph- even Gebs are easy by comparison.
Bullheads are very unfriendly to cruisers and even battleships, but they are awfully big targets for bombers and such to pick at. It's kinda like a Geb, but with 2 battleship guns instead of the battleship shield and sheer number of guns that would make da Orkz proud.
Makos are a weird one, since it's supposedly a light battleship that's supposed to charge in. That type of strategy really only works against Juggernauts, Valors, and other gigantic ships that have point blank "dead" spots, so it really depends on what you fight, and how well the enemy pilot can get you out of point blank.