still dont understand why this isn't endorsed in guides.
My opening order is:
corruption, agony, UA.
By doing this the corruption and UA should expire at roughly the same time. Then you can use fel flame to keep them up. This is especially useful with Dark Soul: Misery, since you can keep up the buffed dots for 100% of the fight. Just refresh agony normally.
What do you think? also take into account that fel flame does deal damage.