lerk lift and then some
Skulk Chariot - Four skulks form a chariot of sorts and a gorge rides on top of them holding infestation reins.
Sticky Gorilla - skulks can stick to the Onos like they can to walls. Imagine an Onos running covered with skulks :D
Siamese Twin Fade - Two fades stuck together one controls movement the other controls the four blades.
Drifter eggs - commander can order a drifter to pick up an egg, then send it to the front line.
Grags - a gorge can pick up a crag and carry it on its back at slow speed for a mobile healing boost.