They are spicy, but a competent pilot should be able to take them on in a Medium ship. High DPS is needed, you can't afford to win through attrition unless flying a Large ship. My Chieftain handles one of such Missions fine without resorting to equipping SCBs, two in a row is difficult. My T10 can chonk her way through at least a few with SCB, haven't been able to stack more to test.
If you are using SLFs, it is best to focus one Vulture down ASAP if your ship can take the beating. SLFs vaporize against two of the Vultures, but can keep one occupied pretty well. If you got 3 Vultures, it's basically pointless to launch an SLF while they are around.
This reminds me that I sure wish Mat rewards increased along with Credits. Sucks that they have a low ceiling. Elite Wing Assassinations should be worth more than 4-5, which is the same reward as infinitely easier Elite 'Solo' Assassinations.