When you say "EP" can I assume you mean over landing... I.e. getting to beautiful locales which may be in remote locations but not necessarily "technical" off roaming like what's required when rock crawling?
If so here's how I would set up my Montero as one...
Shocks: if you have the OE adjustable shocks, keep them until they die and then replace them with working ones from mitsu (or a salvage rig) or with a decent mono tube shock like those made by KYB, Tokico, Old Man Emu, etc. I'd avoid other kinds of basic vehicle shocks such as Rancho 5000's, Monroe's, etc.
Suspension: stock is fine. If anything, maybe add air bags in the rear to improve load carrying ability.
Engine: verify the engine's in good condition (compression or better yet a leak down test) then tune it up. If you have the 3.5 DOHC engine you may need to change the intake manifold if your butterfly valve bushings are worn. This will eventually happen with the original part. Iirc there is an OE replacement that's supposed to be more reliable.
All of the earlier V6 engines (gen 1 & 2) have the dreaded valve guide seal issues. You'll need to eventually replace them or put up with exhaust smoke during a cold start and after an extended idle (3-5 minutes or less as it gets worse). Fix is to replace the valve guide seals. Not sure if gen 3 montero v6s still have this issue.
Transmission: Perform a transmission fluid change or better yet a full flush to remove all the old stuff. The mitsu auto tranny is exceptionally robust so long as you take care of it by performing regular fluid changes and don't abuse her by doing stupid things like shifting from drive into reverse or vice versa without coming to a complete stop first.
Transfer case: Replace the fluid.
Differentials: Replace the fluids. Add LSD additive if you have an LSD. The Locker IS NOT and LSD.
Tires: Upgrade tires as needed. AT's will offer better mileage, less noise (than MT's), and will cost a lot less. Smaller is better for less fatigue to the entire drivetrain. Bigger if you want more clearance or IMHO for better looks
Roof rack: avoid carrying heavy stuff up there if possible. It just raises your COG and drag. But put a rack up there if you want one for looks
Winch: good to have with a winch anchor especially if you wheel by yourself. Do note there's enough room underneath the front between the frame rails to mount many winch models. All you have to do is cut a hole in the OE bumper and mount a fairlead. The rig ends up being a perfect off road 'sleeper' rig.
Other upgrades: Since I don't have kids and am not too tall, I built a storage/sleeping platform in back. It folds so I can still use the 2nd row seats. I did remove the 3rd row seats since I don't ever plan to use them. With the platform 2 can sleep comfortably in back plus I can store gear safely underneath when wheeling. As an added benefit, unsavory people won't see stuff in back that they may want to 'borrow'.
HTH.