Scorpio has tons of Freezes, Squids, and Ice Bolts; this is why your Quintessence will come in handy. Quint an Otyugh and a Firefly Queen. The Otyugh will more or less take care of all of Scorpio's creatures, and the Fire Queen is there for damage.
To flush out creature control, set up a Graveyard or a FFQ. When Skeletons or Fireflies spawn, they will be frozen or bolted. Once Scorpio stops freezing or bolting your creatures, send in your Elves and offensive units, because you know it's safe to enter the playing field.
Permafrost is extremely annoying. Get rid of it immediately.
Scorpio CANNOT use Trident! You don't have to bother getting rid of it, although Stealing it early is useful.
I'm pretty sure Scorpio has some TUs of his own. Beware of that; get rid of his
quanta.