Revans Revenge- Advice on Mandalorians?

Ive been trying out some Revans Revenge but kinda ran into a wall playing as the Mandalorians. From what I gather their strength lies in masses of okay-ish medium ships. However even when winning I take horrendous Losses and those Dungeon ships seem to cost a lot for bringing not that much to the Table, along with Mandos seemingly not having a lot of fighters. Does anyone have any campaign/fleet composition Tips?