First of all, it depends on what you expect from a nymph. If you want her to deal mainly with support. This is the best mastery that will provide skills useful for a frontline warrior. Here again, dream mastery is the best solution. Psionic touch, Phantom attack, various trances make them invaluable. If you don't want sleep you can try war and neidan. However, in my opinion, dream is incomparably better. It is worth mentioning our friend Nightmare, which will additionally strengthen the nymph. If you want your nymph to have more tasks, the Rogue Mastery will work best. However, if you would rather have your summons engage in combat, then the earth mastery is best, because the Core Dweller will work perfectly as a frontline warrior, which will be very useful to the nymph as she is an archer.
