This boss is really easy to kill with every catalyst,
Just keep shooting till you build your specials up and just spam them whenever they are up. This is a good boss to farm with every catalyst to advance your power station to 12 so use all 4 that you can build along the way.
He only has a basic melee attack so just dodge it and keep firing and usuing specials you will take it down pretty quickly. Just made sure you stay in the grid and you will beat him in under a minute.
I first fight him with Crystal Viper at 10:30 in the video.