Custom Command Block Boss Fight for my Dungeon Challenge Map

This is a video of me testing out my custom boss fight. I am playing in Minecraft Bedrock Edition Version 1.19.50.

The Boss's design is a combination of "The Icon of Sin" from Doom 2 and the "Moon Lord" from Terraria.

The Boss Fight goes as follows:
After getting through the maze in the previous room (not shown in this video), you find a checkpoint and a bow (I used netherite armor for testing purposes). Once you head through the passageway to the arena, the boss fight is activated. This spawns in the ghasts in its hands and the ender crystal in its forehead. You must shoot the ender crystal five times to kill him and then defeat any remaining enemies in order to open the door below the boss and continue on. To make it more difficult, you have to climb up onto a platform in order to get the right angle to shoot the ender crystal. Every time you shoot the ender crystal, the boss will spit out five blazes from its mouth. These blazes have five seconds of invincibility so that you can't shoot them with your bow as they are exiting the boss's mouth. You cannot shoot the ender crystal again until the boss is done spawning blazes. The boss will always be holding a ghast in both of its hands in order to try and shoot you off of the platform. You can kill the ghasts, but they will respawn after ten seconds.

This is the second boss fight of the map, but 1.19.50 changed how the /execute command works, so I will need to re do the first one later. In summary, the first boss is just a beefed-up ravager (faster, does more damage, has more health). It really isn't anywhere near as crazy as this.