Don’t worry, I did it… Just. Based it on a time killer team and a lucky death roulette to kill the legendary and then rhyno getting peng with death revenge. 
Try replacing seasteed instead of griff in your frontline. Use knock back on armavolt after he uses protect teammates (very important to use this after protect has been used). Use stun bomb afterwards and bring in griff for a heal. You want to get rid of draco and blight asap. Velo isn’t really a threat to your team since you arent using sleepers/tanks.
Seeing as it takes no tickets, for the lower level guys that are really struggling id suggest just death roulette with both and keep restarting until you get the right amount you need taken out
Isn’t this event over like a few days already?