Didn't feel like doubleposting

>Aptitude must be present...If not...the roll is considered invalid.
You've decided to have Apt take damage, or is this to show the limit of the die pool while holding to your stat-tool order?

I'm inspired by this system, even if I don't understand it. But I do recall some combinatorics...You have 286 combinations of Grades possible. Holy mole, nigga. The range of your summed TN output (a+b+c) is (0...30) = 31 unique values. Converting these to roll-over values on 1d10 (9...1) would be the simplest method. Gee, you could sum different grades and turn it *directly* into a success number for the pool. But...31/9 = R. Oh noes I want this to output whole numbers, nigga, not real numbers. This alone is troublesome and would *force me* to add moar stuff...I'm going insane aaargh whut do elfslave hlep elfbitch save meeeee!

If my *point* is to have wide variety of combos, but have them reducible to the singular die's roll over slots, then some math could help.
a = 1, b = 2, c = 3; 10 combinations with repeats, summed range of all combinations (3...9) = 7.

3 numbers: sum
1 1 1: 3; 1 1 2: 4; 1 1 3: 5; 1 2 2: 5; 1 3 2: 6; 1 3 3: 7; 2 2 2: 6; 2 3 2: 7; 3 3 2: 8; 3 3 3: 9 --> (3 4 5 6 7 8 9)

TL;DR Having three whole numbers with a maximum sum of 9 AND that produce 9 unique outputs is not a thing. A quick solution to use 7 success values in that system. Say 1d10 with {1,2,3} being null rolls.

I don't know how to express this effectively, but the *deep* problem is that 1d10 = 10, 2d10 = 19, and 3d10 = 28 are not compatible normally. Unless someone wanted to treat them as...say...roll over/under systems = {9, 18, 27}. Wow, lookee. It's like some kind of multiplier is the only link between total output ranges.