Boss Help

[DimSpirit]

I'm trying to design a boss fight that is "semi-bullet hell" like.
I've got free movement for the player (up/down+left/right) with a bullet attack for the player.
I'll take any advice on this even if it's a little different than what I was imagining.

I currently have the boss set up with template move settings to move up and down on the screen. I have three FOV for the boss (top, middle, and bottom) to be able to cover the whole screen.
If the boss sees the player in any of those FOV it should use probability to determine whether it shoots a bullet, charges left at the player, or summons two minions that follow the player.
First I'm having trouble getting it to use probability for three things. It seems to only want to use the first two things.
Second I'm having trouble with the charge attack. Currently it's set in template move settings to move left/right (left) for 2.3 seconds(about how long it takes to get to the edge of the screen) with a condition to go back to the other action after 4.6 seconds passes. In my head this should give it time to move to the edge and back exactly where it was before returning to the default action. But I get problems with it being slightly too far left or right and I'm not sure why.

I just wonder if there's an easier way to do the whole setup. Any advice is appreciated. Thank you.

[Baz]

Hello DimSpirit, I made a video going over probability and maybe some advice that would make doing movements easier, especially for boss stage phase timings:
https://youtu.be/z6-_Fr80xt8

[DimSpirit]

Originally posted by baz:

Hello DimSpirit, I made a video going over probability and maybe some advice that would make doing movements easier, especially for boss stage phase timings:
https://youtu.be/z6-_Fr80xt8

That is extremely helpful! Thank you very much!