try this with correct talents, and tell me how its works 
( if i put vendetta after castsequence, it stops the macro
i would put it after rupture, where toon lack energy at the time
prefer use it by manual, need “fill energy” from trait… or put on pre-macro )
mastery/versa prio, keypress delay 55
accepting better ideas…
Sequences['iBoost'] = {
author="Shava@Emerald Dream",
specID=259,
version=3,
source = "Local",
helpTxt = "TALENTS 3 1 1 1 1 1 3 - mastery/versa",
icon='INV_MISC_QUESTIONMARK',
lang="enUS",
PreMacro=[[
/cast [noform:1, nocombat] Stealth
/cast [form:1] Shadowstep
/cast [stealth] Garrote
/cast [combat, harm] Vendetta
]],
"/cast Garrote",
"/cast [combat] Kingsbane",
"/castsequence reset=combat/target Hemorrhage, Mutilate, Mutilate, Rupture, Mutilate, Mutilate, Death from Above",
PostMacro=[[
]],
}