I have a weird obsession with figuring out how things work so here's my take on making the attributes into numarical values.

So we have 5 attributes, and 4 stages of power, as well as 6 sub-stages for each, Numbers in next post

Stage Breakdown:

Number values:

Or if making 100 the absolute max
1.0 = 1
1.1 = 2
1.2 = 3
1.3 = 5
1.4 = 7
1.5 = 9
2.0 = 10
2.1 = 13
2.2 = 17
2.3 = 21
2.4 = 25
2.5 = 29
3.0 = 30
3.1 = 35
3.2 = 41
3.3 = 47
3.4 = 53
3.5 = 58
4.0 = 60
4.1 = 67
4.2 = 75
4.3 = 83
4.4 = 91
4.5 = 99

Wait... wot
Why do the numbers jump like that? Explain your maffs.

For the first one, if we consider secondary as the bare minimum of "Super Human" Tertiary needs to bridge the gap between some one who hasn't trained an attribute and some who has exceeded the normal human limit. Tertiary and its doriki needs to carry it between the two and and primary is claimed to be insane levels, the sudden jump in scaling explains why primary would always trump even a max secondary. as soon as doriki gets added in Primary in general would get insane. and would make there really could be no argument that a +1 would lose in a contest to a +2.

However for the second one, the one I'd claim is more tame, and easier to explain, By setting 100+ as the Special class AKA Devil fruit/Haki+Primary stage, the tiers become much more linear. the reason a +5 always is 1 less then the next stage, is in the attributes or doriki section it says that with 5 doriki assigned to a stat, it counts as, but is still weaker then, the next attribute tier.

If you have any specific questions I'd be happy to explain further.

I like this, but it'd need to be fleshed out more as well as examples provided to make it more digestible for the common role player.

TBH I was just making a number scale first because I always had an issue with vague systems, I'm still working on figuring out a number system for how skills work because those would be more complicated to make examples with. But for raw stats lets call 2 random people's speed stat into play. (Using the 100 max system)
So if the two characters (Lets call them A and B) are having a foot race. "A" has Tertiary speed with 1 doriki, "B" has Tertiary speed with no Doriki. Baring out side influences, A will win but by a very slim, but noticeable margin, as 13>10 It would be even closer if they had non-Prioritized (2>1) but much more of a noticeable gap if they both had primary. (67>60) The point of the doriki scaling is to make it much more important in higher tiers. as for combat itself. if Person A had Strength at Secondary +3, and Punched Person B who has secondary Endurance +2, person a would inflict Minor damage, as 47-41=6, 6 damage.