MCH 6 GCD in Wildfire

[Fannah]

I don't use any GCD before, I just use Rapid Fire, then wait like 1-2sec to take my time being sure I'm ready, and then I almost instantly press Wildfire and Split Shot button (and spam it until the end) while testing it on a dummy.
Then I go in the In game battle logs, and I additionate all the auto attacks and GCD + oGCD dmg *0.25. And the 6th (and last) Split Shot before Wildfire in the logs is not taken in count.

Edit : I will soon host a picture of my in game battle logs (re-edit : Screenshot loaded, just see some posts below).

[Lastelli]

I don't use any GCD before, I just use Rapid Fire, then wait like 1-2sec to take my time being sure I'm ready, and then I almost instantly press Wildfire and Split shot button (and spam it until the end) while testing it on a dummy.
Then I go in the In game battle logs, and I additionate all the auto attacks and GCD/oGCD dmg *0.25. And the 6th (and last) Split Shot before Wildfire in the logs is not taken in count.

Edit : I will soon host a picture of my in game battle logs.

Oh, of course, you can fit 6 GCD in the OH window but only 5 in the WF window! Check Aiurily's MCH openers vid carefully. 6 GCD is for OH only.
So you'll have 6 gcd while overheated, but only 5 will be counted for WF damage. That's ok.