when are you guy planning on adding tekkit main and Agrarian-Skies

No, we don't have an exact date for it.

I hope you add it really soon because I really want tekkit.

So about how much time do we have to wait for agrarian skies and tekkit to be added to aternos again.
I really want to make more buildings in tekkit.

Tom is responsible for the mod packs, ask him.