This level introduces the class 2 heavy driller, which not only uses plasma gun, but also fires homing plasma blobs if you use energy weapons. Medium hulks from descent 1 also making a return.
This level is quite difficult because of the enemies are in groups, it's quite hard to ambush them.
I suggest rushing in to get the spreadfire then kill the plasma guy near the energy center and get in position in the energy center.
From there all is a bit luck and luring. Both the blue and yellow rooms can be cleared by luring the enemies. tactical droids and gamepad bots tend to escape but they will return, if you wait patiently...
Shield spheres are relatively scarce so it's quite hard to make a 100+ run on this level.
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