The Triffid in this form works as highly manouverable craft. It can attack in any direction, and fly in any direction, thus the ship has no weak points. Arms can move and attack targets that are under and over the fighter.
When firepower or speed is needed, the Triffid transforms into this form. It has now much better speed as 3 engines point in the same direction, and more firepower as it can fire in one point from 12 guns.