I generated A Fleet with your rules
It has 2 ships
They are highly competent, this means they all have 1 Skill at /3 and rest at /2 and their competent crew are in The Skills normally used by The Boarding Party
Ship 1 is A 400 ton Ship with 9 crew and 2 Turrets, The Primary Turret has 1 Pulse for The Primary Turret and The Secondary Turret has Beam laser/Sandcaster
An
Ship 2 is A 200 tons ton ship with 7 crew and 2 Turrets, the primary Turret has Fusion Barbette and Beam laser/Sandcaster/missile rack
Their you go. What would you suggest as the ship types for these? as well as that is the Pcs planned 400 ton 5th hand Gazelle with slightly heavier then normal armour and weapons as well as a few custom extras that aren't officially documented in case pirates hack the systems good enough to beat this, their 1st target?. I know its a fairly powerful fleet, but I would like them to try, provided its not hopeless of course