Thanks man! I don't know why, but the warscroll wasn't very clear to me.
Just to make sure, does this mean that a unit of 30 Tzaangors can have as follows:
6 mutants, all with 4 attacks of Savage Blade (2 base +1 mutant +1 for more than 9 models), gettng +1 to hit due to paired blades.
12 with Savage Greatblades, 2 attacks each with Savage Greatblade (1 base +1 for more than 9 models), no extra +hit
1 with shield, 3 attacks of Savage Blade (2 base +1 for more than 9 models), no extra +hit
The remaining 11 will have dual blades, giving them 3 attacks of Savage Blade (2 base +1 for more than 9 models), getting +1 hit due to paired blades