Obi gets one-shotted so it comes down to just Dooku and Anakin in which case:
Seriously,
Sabers: Team has a solid chance, but so does Sheev. Anakin and Dooku can handle Sheev's speed, but Kenobi will struggle. There is nothing that Anakin and Dooku possess that Sidious doesn't. Dooku will likely be the first to tire from fatigue, and then it comes down to just Anakin. I feel we might see a Zonakin moment if Anakin sees Kenobi die in which case I could see the duo defeating Palpatine. Team 6/10
Force: Kenobi gets one shotted, Anakin has been choked by Sidious before not too far from RotS period, Dooku also has had his barrier broken, though it is questionable as to whether or not he would resist. Anakin still possesses a good amount of raw power which might give them a win under the right circumstances. Sidious 7-8/10
All-Out: Kenobi goes down first as he'll struggle with Sidious's speed and can be taken out at any moment with TK if Sheev wants. At this point Anakin might turn into Zonakin and they take the win, or he'll become hindered and they lose. It's subject to environmental factors but I'll say it's an even split 🙂