Quick question, haven't had the chance to test this personally.
For buffs gained in Jinrok (standing in water), Jikun (getting nutrients), etc., I forget if the buff gained appears as a buff or a debuff. I know that Primoridus shows as a debuff, but since you do not attack him until you are fully morphed, you don't have to worry about reapplying dots. But for the other fights, does it just count directly into the dots, or is it like any other proc buffs where you have to refresh it during the proc?
For Jinrok, I usually reapply my dots after I stand in the water, unless my UVoL trink dots are still rolling; reapply dots anyways for Jikun since its a 100% dmg buff...not sure if this is the correct method or not.
Also IIRC, for dmg buffs gained on bosses like Horridon, the buff is calculated on the spot?