Kinde of summon tipe. Inquisitor who control servitors or guardsmen or storm trupper.
It can be thru armore abillity thro skills. Or just baying like a mersenary on the ship.
For exemple you can bay up to 10 guardsmen, 5 stromtruper, 5 servitors, or 3 elite accolites(diffrent types). This on hi level of course.
And another feature which will be fun i thinq. By some teleport hommer(which must be conidrble expensive) on the ship and when you health and lives are near to zero some protectig units teleport to you to protect you for any coast its also means that they take 70 percent damege that you recive(its like "look out sir in table top games").
It will be awsome if you add a unique weapons which will be level up themselves whith killing enemys frome it.