Quote Originally Posted by HonchoBancho View Post
I've always been hesitant to use untraited IR on its own for whatever reason.
Using IR on cooldown will apply it to every other Chaos Thrust and one out of every three Phlebotomizes. Because of the snapshotting system, the crit chance for each tick will be locked in even after IR wears off. DoTs give you the most opportunities for IR to work its magic, and so they more reliably make use of it as a buff, rather than depending on luck.

Holding IR given perfect conditions is ultimately not beneficial because (1) it's not a big enough buff to multiply with BfB compared to how much shorter the cooldown is (2) and it throws off this synergy.

It's not obvious it's working (like it is on monk), but it's definitely there.

Quote Originally Posted by HonchoBancho View Post
And while we're at it, IR or B4B first? The OP explains IR first to avoid the risk of B4B falling off before Full Thrust, but those days are long gone with the amount of SS we tend to have now.
In a dummy situation, BfB would not be falling off before Full Thrust even with no extra skill speed at all. The rotation in the OP is more "best practices" than it is some theoretical ideal you can't always attain. If you have less than perfect uptime in the first few seconds of a fight for any reason, that slight delay on BfB often proves to have exactly the benefit stated.