went thru the same thing with my accord. ended up taking it to the garage and the mechanic used his (better) impact wrench to break the seal. he was nice about it though - just had me pull up to the bay and he got it through the access hole in the fender well and wouldn't take any money.
You need that 120psi.
You need decent impact sockets.
The impact wrench should be lubed well.
Try not to use extensions.
Then, Tighten, loosen, tighten, loosen. And stay flush dead on that bolt head so you transfer all that energy upon your nemesis.
"You have to know the truth, and seek the truth, and the truth will set you free."