Nothing spoils a day of wheeling like a rear axle with a wheel and axle shaft coming out of it. I like to spend a day on the trail wheeling and not fixing my or other peoples vehicle. Going out into the backcountry with something that is prone to breaking is somewhat irresponsible. Same goes for hanging out with a group and being the guy that always breaks his stuff and hold everybody up.
Explorer rear axle is a fairly easy swap and it's strong, you can even find them with the correct gear ratio. From there you buy the axle brackets have them welded on bolt the thing in and never look back. Sure people built Dana 35's with 30 spline chromemoly axle shafts and lockers. Is a lot better than stock, but they still break, still have thin axle tubes, a weak housing and they still break. Friend of mine has broken 2 axle shafts in his super 35 and truth be told he is a wuzz, the shafts in that thing are from Superior and they do make pretty good axle shafts.
So do what you feel is best, but spend some time researching and what you want to do with your vehicle and go from there. There are solutions that work some expensive and some affordable and they both work, just a matter of how much money you throw at or how many trail repairs you want to do. It's your time and money.