How to beat the Host mission with Vorazun, Fenix and Alarak (Legacy of the Void)

In the Host mission of Starcraft 2 Legacy of the Void, Vorazun, Fenix and Alarak periodically send reinforcements to aid you. However... they are admittedly USELESS but the good thing is... THEY STACK. So I managed to stack them as much as I could "1 hour and 40 minutes"-ish and they grew into a huge army. Just build the Pylon to block their entrance to stack lol To be honest I may have used some cheats to make the process easier. But I promise you, you can do this without Cheats because I already did this before (It takes long-@$$ time and effort to do it lol). Stacking up Pylons are the key. Make sure you put them in a way that the three forces converge into one for better pushing power. The march is really slow because the army AI is as good as potatoes. Anyways ENJOY!!