The Leona build for Support is Locket of the Iron Solari and Aftershock. This LoL Leona guide for Support at Platinum+ on 13.23 includes runes, items, skill order, and counters.
Leona Counters
50.2%
(-0.6%)
44.2%
(-0.4%)
4.6%
(-0.1%)
3.4%
315
(-2)
