On the prefinal boss, the guy with the orbs, what do I do?

[Voodin im back]

Im trying to beat the part of the final boss with the guy in the chair spawning orbs, but you have to kill the orbs at practically the same time, how do you do this when they move in a different direction everytime? theres no choreographed movement pattern, just sometimes they move left, sometimes they move right, sometimes one will just swoop directly at you and other times theyll all stay at the top of the screen. Everytime I get past this section it just feels like pure luck, and of course by then Im near out of lives with one hit left.

Even worse, why do the orbs just sometimes go inside of you? I dont know what causes it, or how to stop it, just seems like a cheap shot

[Voodin im back]

Im at the point where I dont even want to play the game anymore because I know I have to do an extremely tedious section just to attempt the final boss. And there's not enough information to create a strategy for it.

Do the orbs take longer to spawn each time? I dont know.
Do the orbs lineup if i wait long enough? I dont know.
Do the orbs patterns depend on what I do? I dont know.
Which orb comes out when they respawn? I dont, ♥♥♥♥♥♥♥, know.
Im just praying that I get it on my first or second attempt so that I have more than 3 lives to fight the boss

[Euclideia]

For me, I just had to try to get them to a similar health as fast as possible so that I could break them pretty close to the same time. The respawn time for each orb is helpful enough to probably allow you to get any stragglers (1-2) on the last phase with all 6 orb types.

[DeviousDoctor]

what orbs give you the most trouble? if you contact an orb, you will succ it up and it will hurt you.

[killkill85]

Here's a nice trick: just flying into orbs sucks them up, whereupon you have like two seconds before they fly out, instantly shattering themselves on the walls. You take damage, but - and here's the important part - you only take one damage, no matter how many orbs you have sucked up.
So an easy way to skip the 6-orbs phase is to just fly into all of them, sucking them all up and trading one health for being able to instantly jump past the phase.