I guess I still don't fully understand, but that's okay I guess. I am, however, genuinely curious about whether or not maximum unlock tier might be a better option as someone with only tier 2 or 3 towers might find that more useful to guarantee a camo tower with an upgrade they have unlocked.
This is largely nitpicking though. I really like this program and at the moment I use it every time I launch the game. Very fun and useful.