We set off in the Thessalonica, as I feel Theseus should be from there. Still sector 1, one of the first ships we encounter is a pirate with three crew members, one Mantis, two humans. Lacking other options, my Mantis and Lanius board. In one-to-one combat against the enemy Mantis, my Mantis is slaughtered. Haha, but I got a clone bay! Blam, Artemis kills clone bay the second my Lanius is killed as well. Ok, not so good. Next Artemis kills shields, Heavy Laser sets cockpit on fire. Blam, blam, blam blam blam blam dead.
Second attempt in the Abomination, virtually the same thing happens, but at least I made it to sector 2 this time.
Third attempt in the Theseus: slight variation in the theme, as I battle against an auto scout in sector one which got no shields, but a level 2 Mind control and a Charge Laser I and a Basic Laser. It successfully mind controls my boarding Lanius several times in a row, allowing the three laser shots to penetrate and deactivate my shields, then hit cockpit and then everything else. Barely survive this encounter. Next encounter got an Artemis, finishing me off before my boarders can kill them off.
Fourth attempt in the Unusable meets several enemy ships in a row with Burst Laser Mk II and Heavy Laser or very similar combinations, one of them Zoltans. Dead in sector 1.
Fifth attempt, for some time I can't decide whether I should name my ship Failed Potential or Rusty Tin Can, and then go for the latter.
Again a very rough start, several close calls. I manage to have enough scrap to pick up a Burst Laser Mk II in the first sector, and then it's going well. At least well compared to the previous attempts. In sector 2, my hull is quite diminished and the store I find is at a dead-end, one of so many, many in AE.

I still go there and get my hull fixed up a bit. From then on, many easy enemies with one-shot lasers and beams or similar combinations in sector 2 and 3. Lots of home worlds, Rock home world, Zoltan home world (I get Envoy instead of the Zoltan shield), Mantis home world, where I'm delighted to find out that a level 2 clone bay is also able to successfully finish the Mantis cruiser quest.

Welcome aboard, Kazaaak! I get a Halberd Beam and then a Hull Laser II, the game is a blast, I'm unstoppable. I go to all beacons in reach and slaughter a couple of Elite Fighters.
I get Cloak and finally Hacking and replace the slightly annoying Lanius with another Mantis, and even such foes are no match (poor guys):

Before the flagship, I have maximised most systems.

I've got some useful augmentations, funnily enough Kazaaak also provided the Mantis Pheromones again after I had sold them earlier, and since it's nice enough to speed around I keep them to the end. Zoltan Shield Bypass allows me to have a flawless victory despite having no hull repair drone and no Zoltan shields.

New high score, finally a boarding ship at the top! Still not a very good score, though, but at least decent.

Theseus: loss, loss, loss, loss, win (1/5)

My win/lose ratio is down the drain, but it was fun!