I am 2.1k gems now exactly. Considering below average-aversge luck in 2 shrines from now on and great PvP limited rewards( like in last anniv) in PvP next month, I hope to reach at least 2.7-2.8k and maybe even 3k if I am lucky. I hope to awaken both mythics at anniv. I was at 750 by June end and have not spent a single gem till now. Grinded a lot too with hell mode almost done. I grinded 370 gems in last month without including shrine. I am not planning to buy any gems with money.
I hope that they allow us to use 20 six start tickets to get a shard of old rare gem mythic once this anniv.