DoT’s stack. DoT’s can end up being very powerful.
Overload gives your weapon dmg skills and auto attacks a chance to do frostburn or burn or electrocute. If you’re attacking very fast it’s pretty easy to get all three up at once.
They do not stack with themselves though.
AKA if frostburn comes off of Overload via an auto attack, and then your next attack also does frostburn from Overload, they will not stack. It will simply refresh the duration.
DoTs from different sources stack. So if I have one skill that has x burn dmg and another skill that has x burn dmg they will work together.
Chilling Rounds does weapon dmg and frostburn, so they should be added together. Same for Storm Rounds.
Share your build via grimtools? It’s worth noting that afaik elemental dmg does not help elemental DoTs. Just like how fire dmg doesn’t help burn. % Burn dmg helps burn.