The Darius build for Top is Trinity Force and Conqueror. This LoL Darius guide for Top at Platinum+ on 13.24 includes runes, items, skill order, and counters.
Darius Counters
51.6%
(+0.6%)
53.5%
(+0.4%)
8.4%
(-0.5%)
15.5%
(-4.3%)
691
(-19)