I don't even know why I post here when apparently nobody bothers to read anything or have even a modicum of reading comprehension.

Like I have said and repeated, Unchained's duration is deliberately as long as it takes you to build another 5 stacks. For the third time --

Defiance + Unchained --> HS --> Maim(1) --> Eye(2) --> HS --> SS(3) --> BB(4) --> HS --> Maim(5) --> Deliverance + FC

That's 8 GCDs. 8 GCDs = ~20 seconds = the duration of Unchained.

So...

You are not forced to spend your stacks on IB/SC during Unchained.

You are not forced to spend your stacks on IB/SC during Unchained.

You are not forced to spend your stacks on IB/SC during Unchained.

You are not forced to spend your stacks on IB/SC during Unchained.

You are not forced to spend your stacks on IB/SC during Unchained.

And the reason why a WAR is in Defiance is because they need the extra eHP and effective healing. It's not necessarily to pop IB. Again, for the third time, you have 25% more HP, access to Equilibrium's healing, and receive 20% more healing. That's the combined effect of ToB and Convalescence. Do you even play WAR at any respectable level?