Classic - warlock macro

Hello I am running DS/Ruin and I am trying to make/find a macro that casts Fel domination > summons void walker > casts Sacrifice. Nothing I have found/tried works, anyone got the fix to my problem? Love u

Best I could figure, because of the cast time of Voidwalker (even with Fel Domination) is to do a sequence, where you press the same button for each spell…

/castsequence Fel Domination, Summon Voidwalker, Sacrifice

I tried it, it works, just have to press the action button 3 times. And then the button remains as Sacrifice as long as the Voidwalker is summoned.