Do I need add-ons to raid? I know DBM is a thing but what do the bosses really do, like a cleave and maybe an AoE?

>Lost Grimoire works fine/inits on [CURRENT YEAR] and on 1.5.97
>doesn't have vendor distribution on my 1500 plugins awful purgatory install
>because it doesn't use lists or SPID, but skse injection or something
This had better be a spell leveling incompatibility or I swear to Todd