[Paul1980au]

Its interesting - the leaky minefields and the bad traits are ideas to play with.

The dumb, slightly smart (limited manoveourability) and perhaps cloak mines (you can lay em keep em cloaked until you see a enemy decloak - they would still be invisible to an emeny until they stumble across a field) but while cloaked sweepers couldnt detect them (a good way to explore a system) leave a minefield cloaked until say you get attacked or if you are in a withdrawl and leave it 5 turns then decloak and wait for the first enemy to stumble across.

Defensive tech for sweepers would be a tech called - mine sweeping (cloaking mines) to uncover them ? and then variuos levels that way