I'm thinking it was Tarkin heading up the nanodroid department... well done on thinking Maul for force-choker. That is a totally logical conclusion. Hwoever you have to wonder if another Jedi is involved, someone going rouge. I'd prefer Maul but whatever.
Does anyone recall any meaningful interaction between Ahsoka and Palpatine in the series that would alert him to Anakin's attachment to her? I'm trying to figure out of Palps has a hand in any of this becoming Ahsoka's problem or if it was entirely random.
On the topic of stun settings, I just happened to be rewatching season 2's "Death Trap" and was delighted to see Boba stunning a clone trooper.