Will you lose points by 'buying' abilities in the wrong order?
This seems like it will be wrought with problems since we can't unbuy ability points.
Say I spend 10 ability points on strength, then I pay 30 ability points.
next I buy 11 ability points in intelligence, I should pay 9 + 6(3 points for 10 and 11 since it will then be the score that got the most points) 15 points. total investment=45points
now suppose I buy 5 strength, 6 intelligence, and leapfrog between these two abilities.
Now I pay 15 + (4+3) = 22, S=5 I =6
S=7, I=6 cost 22+ 4 = 26
S=7 I=8, cost 26 + 4 = 30
S=9 I=8, cost 34
S=9, I =10 cost 38
S=11, I=10, cost 42.
See the problem...
If you alter the cost of abilities and condition it on points already spent, then the history of spending points influences the cost to get a certain build.
I know someone is really trying to avoid copying dofus, but you guys are outsmarting yourselves KEEP IT SIMPLE.
Threshold the points like in dofus, 1 point for the first 50, 2 points to 100, 3 points there on out. This is gonna be a mess if you keep it as is, or maybe you just need a better translator.
Then whatever you skill first will cost 3 and the other 1. So in the end if you want both stats equally high you will pay 4 ability points per point in Str and Int.