It's already adjusted to the new changes on my end with 9GCD BFBs. It's best to use it after HT in the opener, then use it right on cooldown, never hold it.

You should be able to achieve it with a 2.4GCD. If not, again, delay the usage of it by half a GCD. That's also why I go BL -> BFB. It forces you to use BFB later, getting that 9th hit in.