My initial target is to get a Gold Foil Deck except for the Summoners, Legendary and Epic cards as those are pretty costly. So I have been holding Gold Foils. I already have almost all my Common Gold Foil cards to Level 7 and I am slowly upgrading them.

BTW the Idea of buying Essence Orbs is really nice as they are definitely valued higher than others. I will go ahead and buy myself a Couple Orbs.