Declare Najeela and Savage Ventmaw as attackers, triggering their abilities.
Resolve the Savage Ventmaw trigger, adding 6.
Resolve the Najeela trigger, creating a 1/1 Warrior creature token that is tapped and attacking.
Activate Najeela by paying 5, untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.