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Soggodons entire spell queue is 20 seconds long exactly. Someone else posted about this but determined 21 seconds. I double checked vods for SD, ToP and PF and they all came up to a perfect 20 seconds.

Soggodon always casts bindings of misery 12 seconds after the pull and 12 seconds after he finishes his 8 second massive smash

I'm unsure of the exact ID for Bindings of Misery
Massive Smash appears to be 355806

This bar is useful for ramping to AoE the chains that spawn.