A bit late but looks okay and always good to see more KO players.
Id consider dropping 3 skywardens and increasing the Endrinriggers to 9. With the khemist buff on 9 Endrinriggers you can knock out most big bad units (monsters) in one shot.
For the skywardens I'd go 3 small units of 3 with guns. I feel khemist mileage on them isn't great but as multiple small units they can harass and protect other units if needed. By protect i mean get in the way
For general trait id go fleetmaster. You've got alot on that one boat so bring able to redeploy it will mean you can get the best out of it
For endrinwork, last word on the volley cannon is hard to beat
For artifact, I like ignaxs scales as it makes the admiral pretty hardy. 3+ armour and 4+ mortal wounds is good.