Well, looking at the game on DMM right now there's campaigns for:
3 Premium Draws + 2 guaranteed 5* (990 points)
11 Premium Draws + one of any older 5* or 6* you want + other little extras (5000 points)

And I know there've been many other similar campaigns in the past too.

We can only hope that Nutaku will have stuff like these. Buying Flower Stones straight-up really is a complete ripoff.

Oh, I didn't even know it was possible to reset and after reading through this thread, I still don't know how it's done. I feel like those 75 gems I used up were a total waste now and probably were. But then again, it probably doesn't matter much for me.

Knowing my luck from GK, I'll probably be able to get 1-2, 5* ranked upon the first discounted price event for $10, then randomly have a 6* pop out at me for free after 2-months, 1-month if I'm to believe in everybody else's luck with their 6*s. Out of the currently available 6*s, I'll be gunning for Cactace or Sakura, but probably wind up with Bacarra instead.