Actually, doesn't having affixes scale with LEVEL scale them with *character* level? Might want to be careful, there...
The easiest way to make a scaling run speed bonus that scales with level is to make an affix that grants you a bonus to run speed, write in LINEAR_GRAPH in the Graph Override field, and then go back to the Skills Editor, and put the Affix level at 2 for level 1 of the skill, 4 for level 2 of the skill, and so on and so forth, until you reach 20 for level 10. That will give you *exactly* 20 percent bonus to run speed at level 10, no more and no less.
To be honest, 20 percent is plenty anyway. Any more and you risk running into trouble really quickly - no pun intended.
Please check out my WIP class, the Shadowdancer
- I'd love to get some feedback!