Make it more so when you normally would hit a certain of edge points, you get an automatic quest spell/skill/reward. Could be like the spell 'ardor' with is -svs breath or something. Or any range of things that are in the range of moderate to high edges. When you get the amount of points people have when they have like 10 edges, you'd get a better quest spell/skill/reward like fireblood or spoils of the hunt. Then if you hit 400+ hrs and had a tattoo and/or led a cabal, you'd hit the 3rd cap, which would be pimp quest spells/skills/rewards like the barrier spell or executioner's grace (have like 20 or so skills in a pool chosen by RNG).