Question about haste cap

As a Demonology Warlock, what is the haste cap? I ask because Torghast exists and I’ve seen my haste levels reach 185% at certain points by myself; I’m certain if I cared I could go much higher.

But my question is, at what point does haste become less essential (atleast for demo) to the point where versatility, crit, and mastery just ends up being better? There is a practical reason for this, to optimize Torghast runs and whatnot since they seem to regularly break the normal capabilities of things like haste

There is no stable answer to this
All secondary stats are going to be roughly equal for demo generally speaking with a few caveats.
Haste if the only one that really changes gameplay at all for us so feels the best. Vers is the weakest because it doesn’t exactly scale.

Other than that you want to keep a rough balance.
No real caps exist anymore.

That being said all secondary stats now suffer diminishing returns at certain point. Forgot where the list is but they reach their first DR point at about 30% I believe.

126% is the cap for all sub stats, past that it does nothing. Haste and mastery are your best sub stats. Crit comes from trinkets so you need very little on gear, verse is the worst stat by far.

Sim it to be sure.