Hood swing frequency - Caduceus Coil Turn 1
What is the interval or cooldown with which Caduceus can use Hood Swing, and is this affected by anything (Slow, stacks of Steel Scales)?
I have incredible difficulty healing this encounter with SCH because it requires me to either manually cast Embrace or Lustrate in order to heal a tank following a Hood Swing to prevent them from dying due to auto-attacks. Chain-casting Adlo/Physick is simply not enough, in my experience, and so I need to know when Caduceus is able to use Hood Swing again.
The fact that he can critical or double attack (or double crit) makes it impossible for me to tell that he has executed a Hood Swing or is about to, short of using the chat log or watching him on-screen (and even then, Hood Swing doesn't look drastically different, have any charging effect, or produce any sprites/effects that are noticeable.
If there isn't a regular interval or delay with which Caduceus can use Hood Swing, I'd like to know how healers or tanks handle this ability.