Advice on protecting unarmed ships

[Thermodyne]

I have played a few games where I was up against unarmed ships, usually mine sweepers. First thing I do is to make unarmed ships a priority target; that will often kill the mine-sweepers even when you loose the battle. This has a slowing effect on the opposing fleet, as they need to replace the mine-sweepers or risk running afoul of mine fields. Adding a single weapon will defeat this tactic. It looks like this is a mistake that lots of new players make.