If your budget is limited, and you need actual protection:
Engine skid and bellypan skids first. Then Rocker guards. Bumpers later. Throw tire in the back for now, strap it down.
Cute looking bumpers are worthless after you rip a hole in your oilpan. I also wouldn't go Smittybilt, there are a number of far better built options that are in a similar price point... like top quality used stuff.
97 TJ Sport - 4.0/HP D30 w ARB/8.8 w LS/4.88s; 35s and flat fenders on 2.5 lift
84 CJ7; frame off restoration in progress.
The technical advice you get from me here is worth exactly what you paid me for it. Warranty issues will be reimbursed at double what you paid me for the advice.