Pro 4-island easy runs.

Exactly what Fricassee says. A part of the speedrunning as such is to make decisions that matter to your game fast, especially strategic choices. I think it should start right in the moment when the islands appear, not when someone chooses an island.

So you mods will just calculate the real time in any video?

Regarding real time: I'd say from the first point where the IGT is seen to the first appearing of the "Victory" screen. It's just a suggestion though.

Seems to me like you forgot to include the Blitzkrieg squad.