I made a tool to help visualizing one's ranks in a multi and comparing people's rankings.
You can find it here:
Leaderboards are parsed only once an hour so it is not entirely responsive to your latest pushes.
Like other tools, it is limited to the top1000 of each leaderboards, and thus might not find your ranks on some multi.
Write pseudos separated by spaces to compare different accounts.
You can also find the code on github. Feel free to help!