Well Jimmy,
I'll do some more work for you. This thread touches on mixing. So do plenty of others, but you can get an idea of why it is not a good idea to mix any species, two, three ten males or not.
Mixing azureus leucomelas
If you read the whole thread you will read where I point out that there are many different pathogens which can come from different areas of the world. One dart from Costa Rica may have totally different pathogens than one from Surinam. It also may have built up tolerances to those pathogens those different frogs from around the world may not have, being that they had never before been exposed to that pathogen (until after you mixed them together).
Read Jimmy. Search, and read.