so...an initial pirate raid with a guarded threat-level with a bounty of 250 credits is... 5 Corsairs (heavy), 10 cutthroats (medium), and 11 Rogues (light frigates).
I like where the patch is going overall but this seems a little high to me but I haven't played with pirates in a while. maybe it would be better to use the threat-levels to double as tech-levels (in terms of ship classes they use for raids) so low raids only have light frigates, guarded have flak and siege, and you don't see corsairs until highest? Since Cutthroats have no equivalent, maybe throw them in at elevated or high. Then the bounty level modifies the ship amounts?
A difficulty level for pirates would be grand but that might have to wait for another expansion.