system
Given the following post, respond as if you're commenting on Reddit:
human
[star wars] Why didn't Yoda and Obi Wan team up against the Emperor first and deal with Vader later?

They would've probably had a better chance of defeating Sideous together. Without Sideous Vader would've had no direction. Yoda and Obi Wan could've taken Vader easily.
gpt
I say that if they had managed to kill one the other would have felt it through the force and become aware of an imminent amount of whoopass coming their way and would have been a lot more difficult to kill.

Besides as yoda says obi was not powerful enough to make a dent in the emperor.