Best Tier 3 Runes for Darius Champion

attack damage reds, attack damage or movespeed quints....can't lose with movespeed quints. ummm....yellows are situational for defense but primaries would be armor or health, stacking or flat. I'm preferring the scaling armor yellows these days cuz they even out at lvl 6 and give you a lot of armor post-6 and the only really decent blues on non-mages are the scaling MR glyphs... good? if you want to ensure you're doing true damage i'd say armor pen reds or quints but he has so much armor pen and true damage naturally i'd say just go for the AD