i have a z250, and I'm looking at getting t-9 pro wheels with some 6 ply razr's or holeshot xcr's and I have a few ?'s

#1 are the t-9 pros going to be as strong as the stockers with the rolled edge ?

#2 what tire is the best suited for all around trail use , from mud to loose dirt ?

#3 what tire will last longer ?

#4 can I use the oem lugnuts ?

#5 the stock offset is 3+5 if I go with 3+6 will i notice more stability?

anything else I'm missing speek up please
please help , I'm planning on ordering soon
Thanks everyone helping