The rector was easy as there was only a single effect component. For Drown I disabled what I thought was the most obvious component but there's several others. The component I disabled was the custom_effect but it appears the problem is in the spell_mass_enchant block.
From what you are saying it definitely appears something in the DS1 Legendary pack is influencing the way this block works in Drown. You can try untanking the mini-mod and disabling one by one charge_ffx, charge_efct, cast_ffx and cast_efct found in the spell_mass_enchant block of Drown in spl_ds2_spellscmagic.gas and see what's causing the issue.
I will do exactly that iryan the very first chance I get and let you know the result
I will do exactly that iryan the very first chance I get and let you know the result