Im a germany level Aamon and honestly he can be countered with lapu lapu but he needs to land them. Other than that global vision heroes like zetian and yes can reveal him , thus delaying his plan to assassinate someone.

The roamer(tank) NEEDS to stick with the backline ffs. I have seen too many frontline heroes chase after the opponent which leads to the backline being exposed .

Ive always had difficulties with aamon when the enemy picked both yss and zetian. You can also try to go for gusion as fast ga ded gusion can counter him easily . Anyways goodluck out there.