I think I see Charlie's plan at this point.

He wants Parson to pass through the portal, at which point:

1. The people in Jetstone will close it behind him by changing the capital.

2. A decapitation strike of subverted Gobwins, cloaked Archons, and perhaps his casters pouring in from the portal will take out Stanley. Since the portal in Jetstone in closed, they won't be able to retreat to the magic kingdom or to Stanley when they realize he's under attack.

This will result in Parson getting frozen as a neutral in Jetstone, where he can be easily captured.

Am I missing anything? Everything seems to point to that plan, anyway.