She isn't balanced properly.
In a sense of NO clear direction.
Meaning HAS to adjust her ratios and abilities to push her towards one or two roles.
One being support, second being ranged toplaner. (But if she becomes a ranged toplaner, it would mean more ranged topliners would be thrown against her). Maybe even nerf her AD ratios in early game but buff AP ratios so people can play her as enchanter type.
Edit, also, you're your mind.
She is only viable for 3 roles.
-
Really damn good support who serves as secondary adc.
-
Mediocre adc who has to be carried by an aggresive, high damage support. To make up for her inability to trade damage through attack speed.
-
Abusive toplane bully. Probably the most successful of those. Considering her safe range, insane pokes and ability to farm mist from melee champs in top. While also being able to avoid ganks.
Now... midlane? Eh....
You're too weak against mages who can and will outpoke you.
You're too weak against assassin type heroes who will just look for an opening before murdering that 700-1500 HP you usually have.
Midlane W is alsovery hard to land due to minions being constantly in the way. Unless you use it to kill a minion and root the enemy.
Jungle?
That's more of a troll pick, if you're being serious. Majority of junglers will eat Senna alive. Her jungle clear is absolutely atrocious.
Her attacks are way too slow. Her mist generation is terrible too. You can get double or triple the amount on any other lane.
