a few mod suggestions

https://modrinth.com/mod/relicex - an addon to PlayerEx.
https://modrinth.com/mod/purpeille - endgame End progression.
https://modrinth.com/mod/origins-classes - an addon to Origins

https://modrinth.com/mod/bosses-of-mass-destruction - bosses, supposedly

https://modrinth.com/mod/weapon-leveling - weapon levelling

https://modrinth.com/mod/scriptor-magicae - an additional magic system, this seems very mysterious and awesome and stuff

https://modrinth.com/datapack/mob-captains