personaly i wouldnt bother with a suspension lift
my 90 has 235/85/16 tyres, usual would be 235/70/16 or similar
lifts the DIFS up and by default the body
i dont have steering guards, rear dif guard fell off, no intention of replacing it. i honestly cant remember the last time i got hung up on difs driving ruts. you have an almost 90deg aproach angle, not much less on the back end, and if you could high centre a 90 on breakover angle, then hats off to you, your being optimistic with your route lol.
90s are almost unstopable standard form so unless your going into challenge winch events etc then why mess with perfection?
a decent set of muds will take you almost anywhere. strong front and rear recovery is a top priority for getting other folk out. spend your money sorting the nut behind the wheel
rather than upgrading a motor is my choice