Mission 75

This level contains three disablers. You cannot use your basic weapons while they are on screen. Their effects will wear off quickly if you leave their area of influence, but you can also destroy them with secret weapons or turrets.

Fly up out of the range of the top-most one and then fire downwards to destroy it from out-of-view. Destroy everything else you can up here while you are at it.

Blue mode will turn off if you enter their influence, but you can still use it to revive yourself within their FOV - you just won't get to use Blue mode right after the revival.

You can create portals from the middle of the area to besides the disablers in the bottom part of the level. You can then fly out of their view and shoot them through the portals. This is a bit harder than using turrets or secret weapons, but it is a way of saving them for the Overlord.