I am a fan of two arks with 3 warrior squads.
I really should look into the barges, but the ghost arks were a pain to put together them selves
Definitely Drop Monolith, and drop one or two whips on wraiths for beamers. They kill
MCs making life easier.
Less Scarabs more Spyders ... 1 squad of Scarabs with two spiders works well as a tar-pit. Start them small and build them up for 3 points. By round 3 (Average life of Darkness from
SL) you can go from 6 to 12 with two spiders for a fraction of the cost.