Good ideas!
For my 27 warp points to be defended I am considering having one or two baseships with heavy shields and armor whose only weapons are three each of weapon and engine destroying weapons. That way I can disable but not destroy attacking baseships for capture. Also I will have a boarding parties base ship with heavy s/a, null space projectors to take out any SDD, a couple shield destroying weapons, and lots of boarding parties.
But I will not build them until I see lots of baseships attacking, because maintenance on three baseships would eat me alive unless I could depend on capturing an average of two baseships per turn. The mothball/ unmothball is almost as bad as regular maintenance if attacks come frequently.

I was not suggesting an attack on a starbase by RB equipped baseships. As you say, it would be foolish. But a baseship can be presumed to have damage stats similar to my starbase design, and I did not take the time to design my own baseship. It will be a LONG time in my game before I can afford to go on the offensive.