A good chunk of runes aren't available at 30, and you only have the full set at 60.
I know that my skill set changed pretty radically on subsequent difficulty levels, the same tactics didn't work terribly well.
I know that my skill set changed pretty radically on subsequent difficulty levels, the same tactics didn't work terribly well.
In D2 I'll admit the skill tree had some severe flaws, but it allowed unique customization to an extent.