Summary of comments: Sienna bot is fine as unchained.
Lately I’m farming champ with a friend and two bots to bring him up in itemlevel. When playing Sienna on my own, the bots do fine. But when not playing her, we get a Sienna bot, which is just plain useless. Every other bot does well but she. Because of the bot AI, she barely uses her ranged attacks, and her melee isn’t that good. When using her Magic, she isn’t even capable of doing it properly.
Pleeease, just disable her as a bot or give at least the option.