For the enemy AI, regardless how you setup, if you don't have a conditional branch to check collision for the enemy with a projectile then it will never return true. Easy example: If Bullet hit me -> I yell.
So we'll need a common event or something in parallel checking for when Bullet hit me. Your screenshot had Bullet but didn't have the check for "if bullet hit me", therefore nothing happened. This plugin add more features to eventing system of RPG Maker, so the more you're good at RPG Maker, the easier this plugin will be to use.
For more support please leave a message on Discord.