ughh not sure on the 8 gates but he CAN NOT DO WOOD STYLE
Why need 7 gates and Mokuton when you have Shuriken Shadow clone technique?
I'm sure i's been said already, but...He was said to know all jutsu in konoha, which means he could activate sharingan and use Tsukuyomi, too. U_U
Did Hiruzen know seven gates and mokuton? If so, he's the most OP shinobi in the NarutoVerse and he solos Hashirama and Madara both.