First of all, let's talk about equipment. Before you start a boss fight, you must pump your Strength and Health to the fourth level. Your main weapon should be an Electric Whip. You can upgrade it if you like, but it does a great job even at the first level. I don’t have any recommendations for the second weapon, so take whatever you want. It is also worth equipping the Moonstone Amulet to reduce all damage taken by 15%. Finally, you need level 4 ice and magnetic grenades.
After starting the boss fight, use ice and magnetic grenades to keep the boss at arm's length and charge him with an electric whip. Since the whip has a decent range, you don't have to fight in close combat. Whenever you see the boss lurking in the gap, go over to the other side and keep dealing damage.
When the boss has approximately 50% health remaining, he will start using a melee attack and a jump attack. He will sometimes combine them to deal massive damage, so it is imperative to avoid such attacks. However, by this point, you should already be well aware of how to avoid them. As far as healing goes, I personally don't think you will have much difficulty with Level XNUMX. Just stick with the strategy above.