Elger quests and GYM.

What I do to make myself do Elger quests is to go to gym, pick first pet, then look at the crystals I need and do quests as long as i get those crystals that I need. THE REST of the crystals go into the shop for sale!

Pick a next pet in the gym, see what crystals s/he needs, do quests again to get the crystals you need and put the rest in the shop and again with others pets.

I know you want to say why just not take crystals from the first lot of quests I already did. Well then you won't be making as much money then, that's why