The Senna build for Support is Eclipse and Fleet Footwork. This LoL Senna guide for Support at Platinum+ on 13.23 includes runes, items, skill order, and counters.
Senna Counters
Sennawinslane against...
Win Rate
Matchup Rate
Milio
5798 games
2.7%
Braum
2376 games
1.1%
Janna
7012 games
3.2%
Alistar
4213 games
1.9%
Rell
4023 games
1.8%
Shaco
1607 games
0.7%
Rakan
10611 games
4.9%
Lulu
8401 games
3.8%
Soraka
6628 games
3.0%
Renata Glasc
6639 games
Maokai
1860 games
0.9%
Sona
2888 games
1.3%
Nami
7323 games
3.3%
Taric
1426 games
Leona
5260 games
2.4%
Bard
6237 games
2.9%
Blitzcrank
8774 games
4.0%
Nautilus
10708 games
Thresh
14459 games
6.6%
Yuumi
5188 games
Morgana
7206 games
Karma
6705 games
3.1%
Ashe
7150 games
Zilean
2711 games
1.2%
Seraphine
3922 games
Tahm Kench
1454 games
Swain
3622 games
1.7%
Pantheon
2065 games
Brand
4458 games
2.0%
Twitch
1122 games
0.5%
Lux
13536 games
6.2%
Neeko
2513 games
Pyke
7530 games
3.4%
Zyra
7958 games
3.6%
Sennaloseslane against...
Vel'Koz
2922 games
Xerath
7886 games