Well, for the scouting idea, if you want to newb his ass, then I'd suggest rushing,with serious units, or workers. Followed by Stacking and Map hack.
If you are trying to be serious, I'd suggest doing what every other toss player does that I've seen so far.
Surround entire base with 2-3 rows of cannons, followed by 15 Carriers,2 Arbiters,4 Observers, and any other supply left for Corsairs.
But some toss players decide to do zealot/goon/dt attack.
Gemini_Bloodian