If you want to go for a toilet build a mothership first and warp some of your high templar into 4-5 archons; then move out with your entire army keeping the mothership and archons in the back so they do not get sniped early. Try to catch your opponent's army when they are clustered up and drop a vortex in the middle of them. Hopefully the majority of their army gets sucked into the vortex and the stragglers get picked off.
Presto, all that is left of your opponent's 200/200 army is a bunch of blood. I've watched replays of diamond and even master league players losing a game to this technique; it is amazing how fast the food count drops in a split second. So if you are playing against a mothership and you see archons, run away from the vortex for the love of God don't seek safety within it!
If you are wondering why this works it is in face quite simple. Archons have an area of effect attack that will hit all units within a small distance of their target. The vortex sucks all units together into a tight ball on the same exact spot. So for a second after the vortex breaks all the units inside are right on top of eachother allowing the archons to hit everything at once. The storms are there to finish off weakend units. Here is a short youtube video I found of the toilet but you do not need nearly as many archons as that guy had, around 4 will suffice in most cases.
Here is another of some battlecruisers getting obliterated.