Rather than doing a dump from the NAND, go to the source of where you got most of them, your game discs. They are already in WAD format, and you can dump them from disc to SD using a utility called WUFE.
so why is it when i use wufe
on different games i get different versions
mios 8/bc4 ios30v1040 on one
than mios4/bc2 ios30v2576 on another disk.
what are the ones v numbers that are with 3.2 /best ones
The best ones are ones that is trucha-bugged.
The reason you got different version of IOSes is because they are from different discs, thus, they are from different updates, thus, one is lower version one is higher.
Just install either one of those two, and have a run of IOS Downgrader.