As the title suggests, the stone drop rate in it's current state is atrocious, and seriously needs to be addressed. To test the approximate probability of finding a stone within the game, I'd made sure that I would only grind from levels 47-50. I'm currently 50,000 xp away from level 50, so I'll address that outlier within my calculations.
Now then, let's calculate the amount of mobs it took me to kill per level up:
(NOTE, I'd made sure not to include the few mobs I had to grind to reach level 47, and thus these won't be included in the calculations!!!)
If I recall correctly, you'd need:
about 600,000 from 47-48
about 650,000 to go from 48-49
And approx. 750,000 from 49-50
With each mob giving a mean of around 500-525xp. Now then, let's calculate the amount of mobs it took to murder horribly: from each level up:
from 47-48: 600,000/525 per mob = about: 1142 mobs
+
From 48-49: 650,000/525 per mob = about 1238 mobs
+
And finally 49-50, Note that I got bored and used an 50% exp boost during this grind) including the outlier) would be 700/000/825 = 853 mobs
=3215 mobs... I brutally massacred over 3000 mobs, and what did I get? A single U46 blue stone... This alone would properly indicate just how awful the drop rates are.. Now them, my initial estimation of the probability itself was 1/1000 or .01%
So lets see if this measurement fits the data:
If we have a 1/1000 chance of getting the stone per mob, then we have a 999/1000 chance of NOT receiving a stone per mob killed. Therefore we can estimate the odds of getting a stone per mob killed by using the ladder probability to the power of mobs killed or:
999/1000 = .999^3215 = approx. .04% chance of not getting the stone, or a 96% chance of getting a single stone per 3200+ mobs killed!
Now then, taking into account my terrible luck, allow me to be generous and halve the mobs killed to get a seemingly more accurate result:
IF you were to kill 1608 mobs, you'd still only have about an 80% chance of getting the stone.
If you were to kill 100 mobs, you'd have about a 10% chance of getting a stone.
Now then, lets say I do kill another 3000 mobs and get a 96% chance of getting a stone... How long might that take? My mean time for killing mobs, is about 2 mobs per 10 seconds, using these we can convert this to hours:
3215 mobs/2 mobs per 10 seconds = 16075 seconds/3600 seconds per hours = approx 4.5 hours.... And note that this estimation assumes that I'm constantly fighting mobs, not healing, no skill cooldown, no ep regen, etc. 4 Hours of non-stop farming... for a single stone is necessary?!
IN SUMMATION:
Using these estimations, (while ignoring my bad luck because I call hax) I'm disinclined to believe that the 1/1000 odds are correct, and it's likely the the odds are much lower!
If any moderator reads this, I believe that this demonstrably proves the abhorrent nature of farming for stones in Dragon Ball Global. These rates are egregious to look at, and it's disheartening to anyone who even dares to look for stones. I realize that the initial objective of making these rates so low in the original server was because the game was certainly Pay 2 Win, however if we are to encourage the casual gamer, we cannot leave these rates be! I'd suggest we at LEAST halve these rates to 1/500 immediately.
This server has so much potential, and for people who don't have much time to grind (I could've been questing this whole time, but my week off is over) this would provide an excellent incentive for players to grind more often. I dedicated my time to this research to contribute to the community in some capacity, and I'd love to hear your responses!
EDIT: The reason I was so passionate about this, was because I'm a shiny breeder in pokemon, Haha! Using the Masuda method, I've been able to finish breeding a full shiny team! The odds of hatching a shiny pokemon (after completing the pokedex, getting the shiny charm, and using the masuda method) Your rate would be 1/512 (this is for the sixth gen, in fifth gen it was 1/1024). It still took hundreds of eggs to hatch each one, and I must concede that EVEN WITH THOSE ODDS, I was remarkably lucky! However, it took literally days of dedication to accomplish each individual egg. The mean egg-hatching time was about 8 hours, but for some people it took an upwards of 20!
Except stones in this game shouldn't be treated like shiny pokemon: They're not the rare treasure everyone wants more than anything else, no- They're a necessary part of the game that allows us to improve our gear as we level up. Dragon ball online without stones would be a significantly different game.
Another suggestion would be able to purchase stones on the Token shop, except raise the prices of the darn things. I have nearly 1200 tokens, and with 100 tokens per u70 stone (BLUE OR RED ONLY, NO PURPLES OR GREENS OR WHITES), that might seem like a decent trade-off...