Summons actually make bosses harder iirc
Not in the sense that deal more damage or theyre more aggressive, they just have more hp >__>
granted the ai will usually be fixated on who ever attacked them first. You can sometimes bait the ai by cheesing certain aspects of the way game recognizes NPC pathfinding
like say the map that the boss fight is in is big you can have your AI summon attack the boss (works even better if they have ranged attacks or magic). The boss will follow you at first, then the ai summon will attack the boss, and because of distance between you and your ai summon the boss might shift their attention towards your summon and start attacking them especially if the boss attempted to hit you and just kept eating the hits done by your summon!
https://youtu.be/GgVQOSxlUV0?feature=shared
https://youtu.be/5Wf7tiB6WzQ?feature=shared there needs to be a new pkmn pinball game WTF, MAKE IT HAPPEN