How would it be unfair? People pay for stat increase pro packs. Fair is playing the game. If you want to be as good as the veterans- play like them. Everyone wants to be equal from the beginning no matter how long (mostly short) they have been playing. Newbs get a good easy start compared to the long time players. I say if someone is willing to pay for something then it's fair. Just like stat pro packs and nobitity points and crystals.
SUPPORT! Maybe the 10 dollar pro pack could have 3 non-fail aqua and inferno, and 2 dollar pro pack 1 non fail aqua and inferno, and so on. But it needs a little more detail
My detail would be 10 to 20 flat fee for aqua no fail from then on and same for inferno. I say this because these two items are hard to come by themselves.