> Over-the-shoulder pair programming: I've not found a good solution to this. Screen sharing is abou half of the problem. Being able to point, grab the keyboard, etc. is the harder part to solve. VSCode live sharing is about the best option I've found, everything else has been close to useless.

tmate is great for this so long as you're okay being 100% in-terminal. One person runs tmate which basically opens tmate and gives you an ssh url. Then everyone else just sshes in and is in the same tmate session - identical to if you both sshed into a shared host and entered a mutual tmate session. It has a hosted version but can also be self-hosted.