if they really have taken to the air over Aleppo, it would mark a whole new level of military sophistication for the feared group.
Hardly.
Getting a plane like that to fly takes one or two mechanics that know what they're doing and someone capable of flying it. Considering IS contains people that used to be in the Iraqi army, it's not surprising if some expertise in this area is available. The captured Migs are ancient, so all there is to know about them is out in the open and there are no high-tech gizmos that are hard to fix/replace.
If IS starts to use these planes for combat (or one too many parade-flights), either the Syiran army or the US will pop them out of the sky without any problems. Those planes are simply too old to still be competitive against modern arms.
I kind of forget the numbers, but it's more like 50+ ground support personnel to maintain and launch one fighter. Something like 500 hours of maintenance and ground support for each flight hour.
But yeah, just to get one in the air once, a couple of mechanics and someone who has flown a similar aircraft.
