TLDR: use 16k gold  in shop to buy a pack 4 xp boosts that guarantee 1k per match or  36k gold for a pack of 3 xp boosts that give 2k a match 3 times. (Both give the XP even if you are at the xp cap for the day )
I am lvl 100 and it will take 7000+ to level again so 32k gold guarantees this.

The Long story:
Stopping the XP was a strange move that made many drop this. Myself? I stopped until I read more about it and looked at the game. I hit level 97 and actually saw the stop in xp and didnt feel like playing but did. I then saw that I can buy 4x 1k XP in the store. 16k gold for it. so if I pay 20 dollars I can do this 10 times. The progression is about the same as before so progression is not slowed ... if you spend gold . I do not like the change but you can still move at the same pace if you spend the gold, which we get a lot of. You guys essentially changed nothing xp wise. We just need to spend gold we earn or pay to win by buying gold . So use the gold you get and be happy that you can get more from the pot the next day. till then GRIND GOLD