Exploratory
Banned
But that's kind of shitty. Most times when you encounter an enemy you have mostly even chance of taking then out depending on skill. If they have a purchaseable, you are already dead.
I get the downsides to them, I'm just not a big fan of the mechanic.
Not really. First of all they're expensive so they'll be spending all their parts on em. So that means they'll have minimal armor, minimal ammo, etc. Second I usually beat those with purchasables. You just have to be a bit more smart about it.