In Protoss vs Terran, what do you guys think of doing Corsair/Dark Archon to break a tank siege instead of using Arbiters? The Corsairs would use Disruption web on a tank line as soon as it sets up, and a Dark Archon would feedback Science Vessels that tried to EMP the Corsairs.
In the late-late game, the Protoss can eventually build an arbiter for Recall, using the Corsairs to block any missile turrets that may have been set up.
The biggest threat I can forsee in this build are goliaths. Especially with the range upgrade, they can easily snipe several Corsairs each time one flies in to cast Disruption Web, even if the Protoss player casts at an angle. One solution to this would to be to incorporate more High Templar in one's army than is normal, as once the Disruption Webs are cast, the Goliaths may be able to be stormed, and the tanks certainly can.
What do you guys think? I know I've floated a lot of wacky theories around here but I actually think this one, with some work put into it, might have merit.