Saw the replay on Youtube, nice execution and thanks for sharing.
Didn't think of spawning Shadow Pheonix to help clear the frozen wave and get the early void back, I tried double stone of torment instead lol.
What do you think of pulling away one squad of defenders some seconds earlier towards the soul tree (since the target they are shooting at will die to SP)? Could maybe use them to aggro the Stone Aggressor into position for the Shadow Phonixes, so they can dive insantly.
Just a thought, good luck getting that 9:39