Rain of Arrows and Toxic Rain share different cooldowns where other skills don't

- Rain of Arrows 1 supported by Manaforged Arrows Support
- Rain of Arrows 2 in Maloney's Mechanism (Trigger a Socketed Bow Skill when you Attack with a Bow, with a 1 second Cooldown)

In this setup, when one Rain of Arrows triggers, both go on cooldown. The same happens with Toxic Rain.

In the exact same setup, other skills (Tornado Shot, Storm Rain, Blast Rain, Frenzy) do not share a cooldown. They can trigger and recover independently instead.

Demonstration (youtube)