Originally posted by CuriosityKillsTheMADCat:

"They patched that out but didn’t give us buildable objects we can train on? The current leveling thing just makes no sense"

It currently seems that there is no object intended for weapon training/practice in the game. IMHO, high skill levels are not that important for progressing in the game, nor are they necessary to have fun with the game. Also, please consider that the game is only about "half-finished" in the moment so really high skill levels may not be necessary in its current state in order to progress.

Any mob that has spawners works for weapons/block levelling, not really seeing a need for an additional buildable object to fill that role.
Start with Greydwarves/Skellies if you want to grind skills on a low tier character, move on to other mobs after if you want to be hitting things more than once before they die.