don't be afraid to use subtanks in this game, they are really easy to refill. In fact, in town there are some energy capsules that will fill one instantly, so yeah. I think I actually got a Level 4 win against Hurricaune when I first fought him, actually. Basically for almost every boss in this game, it's much easier to use your buster. If you've already gotten the Lx upgrade, use that charge attack to completely destroy Hurricaune.

THE JACKEL