How to beat raven bunker?

Raven bunkers are a lot more difficult to defeat than raven troops on the map. You can take them out on your own, if you are sufficiently strong.

The best method is to converge on the bunker. I would say the minimum is 4 sets of units all at least level 30 for a level 1 bunker. Then as you attack the bunker, different units will come out, target and kill those as soon as you see them. Then go back to concentrating your firepower on the bunker.

To collect the rewards from the bunker you'll need 30 energy.