Yeah I always make sure to hand tighten the nut first no matter if the nut is OEM or aftermarket. The studs are just not great. Same thing on my NC mx5.
I am planning to switch to ARP studs with the GT86 I will still take care when installing the nuts but they should be worry free
Oh and always use a tq wrench
Use the impact gun to snug them up than the rest with the tq wrench when the car is on the ground