I realy like the protectorate and fenn is defenetly the most popular, i've been running him with a firespray and doing well but i wonder if there's someone better.

also would stealth device be better than autothrusters due to the protectorate's in your face tactics?

Autothrusters still work if you're at range 1 if your outside someone's arc; you tend to find yourself being shot at by turrets a lot.

Fenn is elusive, but not so elusive as a TIE interceptor; he tends to take the odd hit here and there - less of an issue with his tougher hull, but any hit will take out the stealth device; you need to keep evading hits completely to get mileage out of it.

I saw him flown yesterday with Old Teroch and Manaroo, or with Dengar.

Manaroo is nice, because you can always use your action to reposition and let her handle feeding you tokens, whilst Dengar gives you a second PS9 ship with plenty of dirty tricks.

He does well with a lot of folks, I guess it's all preference and play style. I'm not the best with Manaroo but many people are using a Manaroo/Teroch/Fenn list with success. I prefer to run him with Party-Bossk for heavy hits and an Unhinged TLT Thug for consistent damage.

One thing I can say confidently is Autothrusters > Stealth Device. I flew one game where a docked Ghost shot a Dorsal Turret at range 2 Fenn, I had a tokenless stealth device, blanked out and died. Fenn is way too precious to soak hits from a turret.

There are two ways to build a list around Fenn:

1) Support ships that give Fenn tokens and help him survive (primarily Manaroo, with or without mindlink).

2) Scarier ships such that your opponent is forced to deal with other threats, giving Fenn theoretically an easier time getting into range 1 of enemies (actually preferrably out of arc----a lot of players try to joust with Fenn which is a mistake unless going the above route with support ships, but even then you leave Fenn vulnerable to bad dice). Examples of ships that fall into this category are the infamous 'party bus' and high damage dealing ships (such as HLC toting scyks or an aggressor or even a torpedo scout----not as dead as you might think if you know how to build it without deadeye).

Manaroo all the way.

Ketsu is also nice, put VI on her, get two tractor tokens on his target before he punches it in the chops.