Senna is a late-game scaling champion unlike traditional supports; prioritize items like Runaan's for powerful scaling.
Don't expect strong early damage or healing; instead, focus on utilizing her crowd control like slows and roots.
Communicate your Senna pick early to your team, as her playstyle can resemble a secondary marksman rather than a conventional support.
Stats
Sorcery + Resolve
Q
W
E
R