I come up with this 2 months ago. Armored missile boats, where 2 armor plates worth 3, but only have the mass of 1. With the extra raw HP, these would be perfect to use polarized launchers while not being glass cannons.
Also, there could be more than just combat pirates, the Minmatar/Caldari - filled by the Thukker Tribe for example - could be an omni-logi faction (including remote hull repair bonus). Mixed fleets would love these ships.