The Varus build for ADC is Guinsoo's Rageblade and Lethal Tempo. This LoL Varus guide for ADC at Platinum+ on 13.18 includes runes, items, skill order, and counters.
49.5%
(-0.4%)
54.2%
(-0.2%)
3.6%
(-0.3%)
0.4%
(-0.1%)
743
(+4)