Your mods should be to make the X do what it has trouble with without them.

If you have 2wd, your off roading will be very limited, but you could get a set of aggressive MT's just for the rears, and maximize your traction.
...or just get AT ko's all around and be done w/it.

I fit 305/70/16 AT ko's on mine w/2" BL/3" SL.

The cheapest and fastest way to fit larger tires is a body lift...typically a 2" to fit 33's, a reasonable tire size.

A 1.5" PML will help with frame clearance for $50 in parts plus an alignment.

If you get a 2" BL for ~$170, and 33" AT ko's for daily use, and a play set of rims and tires for the rear to swap on when you are going for it...you'll be ok clearance wise.

I don't know whether you are talking mud or rocky terrain, etc...but the tires should be chosen that will work in it...like Boggers kick ass in the mud, but are not so good on rocks, MT/R's kick ass on rocks, but are not as great in mud, etc.

A set of sliders are essential, as you cannot hi-lift yourself w/o them....and they save your bacon on break over, etc.

If you go over stuff that breaks truck bottoms, you'll need some skids, but frankly, with 2 wd, you probably won't be in that much trouble normally.

Get recovery gear, like straps, a hi-lift, etc...

Remove the rear sway bar, the stock mud flaps and side steps, if you haven't already.

Hook up with a local club or local wheelers...going alone is asking for trouble....and they'llll know all the good spots too.

That is a good start.