The Ziggs build for ADC is Liandry's Anguish and Arcane Comet. This LoL Ziggs guide for ADC at Platinum+ on 13.24 includes runes, items, skill order, and counters.
Ziggs Counters
49.8%
(-4.1%)
59.4%
(-1.7%)
1.7%
(-1.4%)
0.3%
(-1.3%)
889
(-77)