>>2035553addressing spoke tension is RETARDED on old/shit wheels and the people telling you to do it are stupid and or trolling you.
all you can do is try to true them, and keep spoke tension in mind, so if you have a choice of loosening or tightening to achieve the same goal, know which one might be preferable because the spokes are super tight or loose there. .
As for rounding off the nipples, you should have oiled them before trueing. Do this whenever they're even vaguely difficult to turn. I use pic rel. Even wd40 or chain lube is better than nothing, but they will make a mess, and the later is too thick. So they can fuck up your brake track. Sewing machine oil in a needle nose injector bottle is good too.
You're also probably using a shit tool. Cheap spoke keys work ok but the nice ones are much safer.
