Sure its helpful, but to get the second achievement you have to beat it without using it! So if you don't care about achievements ignore this part.

Attack the boss and get in as much damage as possible, then upon his first attack, clear the field of the hazards.

The boss remains idle for a bit then dashes foward, take advantage of that and deal as much damage as possible to it before moving, and as it starts to dash move out of the way and clear the trail of hazards it leaves.

When it summons enemies, clear a path and move out, this may take some prediction of their movements, and once youve exited orbit, clear them from outside.

The boss moves at a high speed orbiting you spawning enemies, similar to the summoning attack clear a path and escape after the boss has stopped orbiting. While the boss is still orbitting clear enemies and defend yourself.