Hi Devs!
This is just going to be a suggestion after playing the game for quite a while now.
1st is mainly on Energy, Job Keys and Arena Orbs. It would be best if it is going to be a full refill when purchasing using gems. (i.e.: Job Quest Keys not limited to 5 keys per refill purchase)
2nd is for the Item / Equipment slots (Inventory) realized that regardless if the item nor the equipment is equipped to a hero it is still occupying a slot within the inventory.
Looking forward to hear from the devs.