I have an X-Jack air jack, because I used to overland with a unibody Subaru. It was great for that vehicle, as there were very few appropriate jack points, and I was worried that I wouldn't be able to use the OEM jack because access to the jack points may be compromized when out on a dirt road. The X-jack was great for the Subie, as there are minimal sharp points underneath, and it's quite flat, so I only had to keep away from the hot exhaust system. I did test the X-Jack using the exhaust to fill it, which I think is what Frenchie has tried (we've discussed this before), but the air compressor is so much faster and easier to use for one person, so that is what I always use for inflating the X-Jack.
I have also used the X-jack on my lifted 4Runner, and it has worked very well with no issues. I always use the supplied very thick piece of rubber to protect the bag from sharp points underneath the vehicle (the off brand air bags don't seem to have this protective rubber sheet, and I think this is where some of the negative thoughts about air jacks originates), and the bottom of the bag is already reinforced. I would, and have, changed a tire on my 4Runner using just the x-jack and working solo. Of course, make sure that nobody is positioned such that they'd get hurt if the jack failed. I would have to be in a very dire (life threatening) position to take the risk of changing a tire with just a hi-lift jack holding the vehicle, working solo or with help. I have actually done that, but I was much younger then! If you try really hard, you might be able to use the X-Jack to push a vehicle sideways to reposition the tires away from ruts. It is actually too stable when the vehicle is level to do this easily, and I would position some floor mats to protect the X-Jack as it moved over onto it's side. Interestingly, even when you open the 2" diameter air release plug, the bag deflates quite slowly. It's a large volume, and the bag is at <10psi, so I guess it makes sense.
All that said, the OP's vehicle is too heavy for the X-Jack, and a hydraulic jack (or two) sounds like the best solution. I just wanted to comment on the efficacy of the X-Jack, since it has been discussed here. I can't wait until the ARB Jack (hydraulic) or a similar design becomes inexpensive and has more accesories available.