358/2 Days In dire need of help for Boss Battle

If anyone has gotten this far, PLEASE reply to this thread.

I'm on Day 301...I think.
The fight with the flying Heartless is ****ing frustrating as hell. First off, it's already hard enough to land a hit on the Heartless' "tail" because it's constantly moving and it doesn't stay still when hit. The random orbs it shoots out of its tell are close to impossible to dodge when you're in a certain range of it and when you get hit, it's extremely difficult.

After you destroy a section on the tail, it starts to spazz like an idiot and hits you with an attack that is pretty hard to dodge - some sort of shining light. It flies around to set up an array of those same light orbs, about 10 or so? Then it starts ramming into you flying back and forth. This attack is surprisingly difficult to dodge despite the use of Glide. Not only do you have to watch out for its ridiculously large wings (which have an extremely large attack range) but the orbs could randomly hit you at any time and with the bird constantly ramming you, it's difficult to recover from the flinching animation and even more difficult to heal yourself.

If the AI of the bosses are changed in each difficulty, I'll shoot something (I'm playing Proud Mode).

HELP. ANYONE. I WILL HUG YOU...or something.

 

Hit it until it dies.