Using a combination of logged hex and oct token rolls on a test character, and a program I wrote that is a reverse engineer of some old stat rolling source code, I believe I have calculated the probability of achieving stat totals with a good degree of accuracy. This information uses the following assumptions...
* Four 1d6 die are rolled, the three highest dice are kept and added together. Then 1 is added to the total. If 19 is the total, the total is set to 18.
* The lowest stat that can be rolled on a hex is 5.
* The lowest stat that can be rolled on an oct is 8.
The results show roughly the average number of tokens it will take to roll the total with what type of token. The program was calibrated to roll the total 1000 times in order to calculate the average. However, it's completely possible to roll a total with only 1 token... or it could take thousands more than the average. Multiple executions of the program showed that the deviation between the average tokens grows the higher the total you aim for. It's also an observation that for each extra point in the total you aim for, you effectively about double the number of tokens required to reach that total.
It's also proven that oct's are definitely superior to roll than hexes, however hexes are cheaper. Hence I am lowering the cost of octs from 75k to 60k to make the effectiveness of both tokens roughly the same, as I often have trouble moving one type or the other based on "the superstitions/misinformation" of the player buying them.
People often ask me, what is the minimum amount of tokens I should start rolling with if I wish to get a playable total. I think that absolute minimum should be about 20 tokens to have a good chance to return to something 75 or higher. The other thing to do would be to save some tri tokens and use them in the case you bust.
It would be possible to roll a 90 in theory. Although somewhere around 80k-100k tokens would be required on average. On the other hand, you can buy the stat point in the avatar shop for 10B, which is approximately 10 hours of grouping at avatar levels. (12hrs if the leader is a smoker) How many tokens can you load in that time? My recommendation is that players aim for 82+, as to hold out for any thing higher could lead to frustration due to the diminishing returns. The money I make from selling tokens, probably hasn't covered the costs of the vaults I store them in, but I have probably helped more than 10 players achieve character stats higher than 80.
Hexes
Avg Rolls to roll an 80 : 80
Avg Rolls to roll an 81 : 140
Avg Rolls to roll an 82 : 240
Avg Rolls to roll an 83 : 470
Avg Rolls to roll an 84 : 1000
Avg Rolls to roll an 85 : 2100
Avg Rolls to roll an 86 : 5000
Octs
Avg Rolls to roll an 80 : 70
Avg Rolls to roll an 81 : 120
Avg Rolls to roll an 82 : 210
Avg Rolls to roll an 83 : 420
Avg Rolls to roll an 84 : 820
Avg Rolls to roll an 85 : 1850
Avg Rolls to roll an 86 : 4400