Could never work, jobs gain more potency per sec or how ever you wanna call it as they level. Imagine the lv 15 lancer queueing into sastaha and a lv 80 drg shitting all over him with his skills. This could go 2 ways "wow thats cool" or "fuck this im worthless"

Balancing fights and hp would go out of the window instantly as well. As cool as the idea is, impossible to make it fair.

And even if you had the magic numbers and said ... "dragoon optimally played at lv 90 should do X dps, if we scale that to lv 15 its Y" ... how many players actually play optimal in DF? The lv 90 one would have to pull of his entire rotation to do the same damage the lv 15 lancer does by clicking 1 2 3 ... i can already tell you who's winning that dps race and its not the dragoon haha