Yesterday, I'm done teaching summoners. They will need to practice by themselves to be able to create portals. If they needed guidance, they can just ask either me, or Lina since she can also use portal well.
Other than making portals, the summoners only need to increase their level by using their monsters to defeat other monsters. But since they are practicing with portal first, they will need to have their monsters by their side so they can open a portal to a safe location.
I think once they are better in opening a portal, I'll bring their monsters to nearby island that has a lot of monsters so they can increase their level. Maybe within two or three days, the summoners should be able to open a portal at least three times.
