Easily done alone on the Moscow map and should not take much above 8 minutes to achieve so no real need to boost this with others unless of course you wish to.
Use a plane like the Su-47 Berkut with default weapon pack MM and HSM. Switch to MM immediately and take out the first 5 with 2 rounds turn back and take out the next bunch of 3+2 with another 2 rounds of MM. If you missed any switch to HSM and dispose of them quickly, rinse and repeat for the next few waves. It is safe to use the healspot until the SAMs appear in wave 4/5 then it can become a little hairy at this low altitude so top up at the end of wave 3. Jack up to 12-15k altitude to aviod SAMs below turning to avoid missile locks, repeatedly dive from 15k with MM and snipe 4 at a time, you will probably be running low on ammo by the end of wave 7/8 so just dive for the heal spot, you still have a ticket to go whereby everything is replenished anyway. Return to 12-15k altitude to continue sniping as before and this easy challenge is completed with at least a minute left of the final wave.