Smouldering Wrhat: Single target or damage over time?

[Phiolin]

So, taking "single target" as the dagame itself ( I know the skill is single target, it damages only 1 target): Is it considered damage over time, or single target? Whats´traceries are best to chose as Fire Rune Keeper? ( Single target, or damage over time).

[hoibideptrai]

So, taking "single target" as the dagame itself ( I know the skill is single target, it damages only 1 target): Is it considered damage over time, or single target? Whats´traceries are best to chose as Fire Rune Keeper? ( Single target, or damage over time).

stolen from people who tested: SW's first hit is affected by Single target tracery, the following hits are affects by damage over time tracery

[Phiolin]

thank you