OK, a couple strategies for the Dark Prince of Night:

A Once the soul-balls come out, focus on jumping around them and shooting them so that they overlap and occupy the same space. This makes navigating around the other attacks a lot easier.

B One of the corners(the left, I think) lets you avoid the mbumive fruit-burst, guaranteed. Staying near there can make that section easier.

C You can touch the flames in the firey fruit-shot attack- only the fruits themselves hurt you.

D SPOILERS: Good News: Drac’s third form dies in one hit and doesn’t attack, so you have nothing to worry about there.

Above all, remember that dying isn’t always your fault- Drac is the only boss with a semi-random moveset, so sometimes you can just get screwed. Good luck, and keep at it!