how is this figured

[JimmyGrin]

How is "Based on Character Level" determined? Say I was a level 71 and a weapon had this for Maximum Damage, how much more would be added?

thx.

[Hrus]

That's different for different items.
For example Windforce gives +3.125 maximum damage per character level, Eaglehorn gives +2 maximum damage per character level. The final result is rounded down.

[Diabolico x64]

If you are at clvl 71, you would take that number (damage, AR, whatever) which is displayed currently in that modifier, and you would divide that number by 71 to get the approximate damage/AR/etc given per clvl. I say approximate because the numbers are rounded down when displayed.