Term limits first. Lifetime appointment is stupid and you might as well ask for corruption up front.
Then electoral college. 0 reason for that shit to still exist. Farmers can pick up their farms and move to Canada or Mexico if they dont like being outvoted.
Then we can worry about universal accountability, starting with the removal of absolute and qualified immunity. The concept of immunity in law is a cancer to actual justice. Once we actually start holding justices and judges accountable for their actions, we can consider having more.