The proc chance percentage that you see on Arks do not mean you will have that exact percent chance for the Ark to proc on every hit you do. Although the Ark may say “Max.Activate Chance: 15%, 17%, 30%”, what that actually means is that based on what skill you use to try and proc the ark, the max chance it will proc will vary from 0%-15%/17%/30%. The exact formula is unknown to me on how the proc chance is fully calculated, but it is based on the SFR of the attack/hit used. Higher SFR attacks gives you the ability to hit that “15%/17%/30% Max.Activate Chance”.
This is balanced in a way that although lower SFR skills don’t have high chances to proc, they hit more often/frequently, giving you more chances to activate the proc of that Ark, compared to higher SFR skills.
If you want to:
- Increase your AA (Auto Attack) damage = Swift Ark (mainly AA classes)
- Increase your AoE (Area of Effect) damage = Storm Ark (Any damage class)
- Increase your Single Target damage = Thunder Ark (if you have low SFR skills (mainly DOT based classes)
- Increase your Single Target damage = Punishment Ark (if you have high SFR skills (mainly high damage skill classes)
Side note: AA is considered a skill in the category of Basic Attack. So in essence any of the Arks mentioned above can work for AA builds, but the results will vary based on the build/situation.
Hope this helps you and future players in deciding your Ark choice.
Edited for more clarity