I try not to get damaged in the first place . Keep away from destroyers etc .

For the DC teams you will want a mixture of those skilled in Mechanical and Electrical, with one having high Leadership being in charge (ideally this guy also has a decent mech/elect skill as well). Not everything on subs is mechanical...remember, someone has to know how to fix the electronics...

Probably about 2/3 need mech, 1/3 need elect, and one guy needs the leadership (and to be in charge).