The best deals in terms of XP run are not out of AMS nor CDG, as the goal is to run through the most segments possible (xxx-AMS-CDG-xxx r/t will trigger 30xp more than AMS-CDG-xxx). Considere positioning to a city easily accessible from AMS (via air or rail). Best candidates for "final" destination are usually located in Northern Europe. You have several examples mentioned in this thread or related ones.