If you're keeping up with mostly level-appropriate green/pink/blue gear, I'd advise a mix of the two if you're leveling with PUGs. If you go all STR points, maybe go 3 or 4 of 5 VIT accessories. I personally advise this method since you can need VIT gear, but you can flip it around if you go all VIT points. Really that's just a baseline and it will depend on your playstyle and confidence level, as well as if you're leveling with competent friends.

If your gear starts getting a bit out of date, you might consider skewing a bit more toward VIT. Then again if you are lucky enough to be leveling with a healer friend that you're confident in, it gives you way more leeway to focus on STR.

With the exception of hitting 50 or 60 with players that have ilevels way higher than yours, you shouldn't really have any serious threat issues regardless of build if you use your skill correctly. It's mostly about staying alive and contributing what you can to DPS.

Regardless of what your go-to build is, try to keep around some extra right side pieces so you can mix and match as needed.