You just have to watch for electricity levels on Damkina and SSTOs. Marduk is ok, but it does not have a lot of torque All crafts work. KADF Valiant flies best, but amount of dV is not huge - 4000m/s. If you need any help PM me and I will try do advice, but not to uncover plot Crew of KADF Valiant on way to investigate what happend in Joolian system.