Well the "MLG Worms" are made the way they are so that you cannot exploit the weakness of the Solar Pillar's enemies by flying over their heads where they can't hit you.
That's why the "MLG Worm" exists in the first place. It is meant to be "unfair", to keep you from pulling cheap, unfair tactics on the rest of the mobs. Every other pillar has lots of flying enemies except the Solar Pillar, and Re-Logic knew that players would simply stay airborne to make the Solar Pillar a joke.
Unfortunately, they seemed to have miscalculated the ease of building a box too. But then again, you need to know where the 4 pillars will spawn to build boxes near them so that implies you've fought them without boxes at least once.