Ranks design

Today I designed the symbols for the 10 ranks we will be having.

To me it's important that there are not too many.
If they are not so many, it's a more meaningful event, if you get promoted to the next higher rank.

And it was also important to me they are self explaining. I think they are, what do you think?
I don't like it in other games, when I have to look up the ranks, so I know what the order is, because they don't tell me what they are from the first glance.