Funny how old experienced guys all tend to think the same?
I say ditto with Blaaster on the thread file.
Hammering on the head of the ball joint has compressed the threads, especially the very first threads you are going to try to line the die up on. If you get the die started, it will be off pitch with the rest of the good threads. The thread file takes its cue from the good threads, lines up with them and cuts into the bad ones at the end. Once you have the pitch straightened out and the mushroomed end filed down, THEN you can run a die down it.
That $15 dies set is likely hardened carbon steel. Very brittle. HSS - High Speed Steel is the better choice. More money but works so much better.
Steve