Returning Player Help

Hello,
Not that great with macros and cannot get shadowstrike from stealth to step behind my target. I get close with the following, but does not work all the time. Any input is appreciated. I have played around with stances and bars amd such, I am assuming it is because I am trying to cast dance first? Just wondering if it is possible.

#showtooltip shadowstrike
/cast Shadow Dance
/cast Symbols of Death
/cast Shadow Blades
/cast Shadowstrike

You can’t cast multiple GCD abilities at the same time.