HI aioneru,
I'm running 8 Gentle Typhoons per channel and although they draw less current than your fans, I don't think you will run into any current limit problems.
Not sure about the thermals though, as I'm running a water block on my Aquaero. Martin tested the current and thermal limits in his preview of Aquaero 5
here, so you can take a look to get a general idea. Your fans are actually rated at 2.4W, so 6 fans would be similar with Martin's test of 15.3W.
Kind regards,
Boris.