IMPORTANT EDIT:
Swirl caps at 2 instances per enemy https://imgur.com/gallery/KvnLnli
so the info that I got about Swirl hitting 25 times on 5 enemies is INCORRECT.
All credits goes to Feerta for correcting this with proof.
Also, this should be added into the basics of swirl:
"Any form of Anemo DMG can cause swirl, including skills, ults, even Bow Charged Attacks that cause Anemo DMG, or even Normal Attacks like from Sucrose."
Timestamps:
0:00 Introduction
0:13 Basics of Swirl
1:40 Scaling with Multiple Enemies
2:26 Special Interactions
3:30 Conditions / Things You Should Know Before Building
Current plans for next videos:
Venti Builds
Venti Vs Sucrose
Venti's skills
Keqing Build, Skills and Combos
Conditions TLDR (updating here as I find more info):
1. Transformative elemental reactions, which includes swirl, overload, superconduct and electro-charged, only scale with the character's level, and their elemental mastery.
Amplifying Reactions, which are Vaporize and Melt, scales with pretty much everything
2. Proccing Overload does reduce the amount of swirl procs, there is an internal cooldown for elemental reactions (or at least specific ones)
3. Viridescent's extra 60% swirl damage is ADDITIVE, not multiplicative.
this means that the additional 60% bonus swirl damage from the 4th piece viridescent set is the equivalent of around 140 elemental mastery.
4. Overload does 3.33x more damage than swirl, so you would need to trigger swirl on more than 3 enemies to make it do more damage than one proc of overload.
5. Swirl is absolutely useless when fighting against slimes / enemies who are immune with their innate elements. e.g if you fight 5 cryo slimes, it's extremely difficult to absorb another element other than cryo to damage these slimes. Most of the time, skills like Venti's burst will absorb cryo, which does no swirl damage (and the additional cryo dmg) since they're immune to cryo damage.