Cataclysm Apotheosis Addon

If your modpack is not at such a high power level, we recommend Cataclysm Apotheosis Addon Lite.

Required Mod.

 Attributizer.

Pehkui

L_ender's cataclysm

L_ender's cataclysm is definitely a mod that adds a high difficulty boss but is far easier to beat in a modpack that adds multiple weapons. (unless the creator changes the configuration).
Also in my opinion the boss is more vulnerable than it looks. A player with high attack power can defeat it in a few dozen seconds.
Make the following changes to make this mod boss the end content boss of modpack.

 Ender Guardian (spoiler alert)  https://www.youtube.com/watch?v=qylDRq6svhg

Harbinger (spoiler alert) https://www.youtube.com/watch?v=ZjHtFLvXwvI

Ancient Remnant (spoiler alert) https://www.youtube.com/watch?v=O4gAhpBtjgA

Leviathan (spoiler alert) https://www.youtube.com/watch?v=Xh3gnByrMYM&t=203s

Ignis (spoiler alert) https://www.youtube.com/watch?v=YonTACiuBnE

Maledictus (spoiler alert) https://www.youtube.com/watch?v=9pvRfo3p6AA

CurseForge link https://www.curseforge.com/minecraft/mc-mods/cataclysm-apotheosis-addon