Runes will often scale based on character level. Each class has a different rate and are listed below:

Rogue

• Base Damage: 5.741530-0.255683*$PlayerLevel+0.032656*$PlayerLevel*$PlayerLevel
• Per Combo Point: 8.740728-0.415787*$PlayerLevel+0.051973*$PlayerLevel*$PlayerLevel

Phase 1 (Level 25): 19.759 Base Damage, 30.829 per Combo Point

Other

These formula were found using the data: https://wago.tools/db2/SpellDescriptionVariables?build=1.15.1.53495