I made some Changes:

/ac "Venomous Bite" <t>
/wait 2.5
/ac "Windbite" <t>
/wait 2.5
/ac "Heavy Shot" <t>
/wait 2.5
/ac "Heavy Shot" <t>
/wait 2.5
/ac "Heavy Shot" <t>

And I use any skill that ignores GCD, I also use Bloodletter as soon is restored and I start with Straight Shot for the buffs and refresh when it goes, I ve seen a huge improvement on my skills since then thank you for taking your time to explain all this