As a ps4 player I couldn't think of a way to test this on my own, so hopefully a PC player can answer.
If you cast a dot on your staff bar, then swap to a DW bar for the spell damage buff, does it affect the dot's Spell damage coefficient.
Also, would it be the same for curses like magica detonator, or a sorcs velacious curse?
And what about area of affect dots like liquid lightning?
I read somewhere that curses update at the time of "detonation", but the post was unclear on DOT. Knowing this is quite crucial to my bar sets.