Thank you fellow tankers! Please continue with any suggestions. Also, any suggestions of how to use supplies like a pro?

Since I started playing the game a few months ago, it's clear that certain battle maps and modes pay out more crystals than others. This appears to be a function of the number of kills and number of players. I prefer to not pay money to buy crystals. There is a kit for sale that I'd like to get, the "Osaka" kit that cost 74,200 crystals. I've got 12 days to come up with 52,000 crystals. I've learned that Polygon CP gives a lot of crystals, but I don't think I can play Polygon CP straight for 12 days. What other maps and modes are known to have higher crystal payouts? To get crystals fast, I play with my Isida M1 turret, and M0 Hunter (or Hornet). (Wish I hadn't spent so much on MUs, but then perhaps I wouldn't be where I am, hard to know…) I did decide to pay $10 to get Premium for the next month so that I could get 50% more crystals for each battle. Please let me know which battles to play in order to get crystals faster. And yes, I've gotten my first (and only) gold box! I love TO!! Thanks!!