We took some names with that Goblin invasion right there! Was pretty awesome two of us stood on the hill slashing at them from both sides! We need to organize some structured farming of hellstone too, because the bone worms and imps really kick me apart!
aye defo, although I got away with mining over 400 ore on my small world by filling in the hole i made in the ash behind me whilst digging which eventually got me out of range of the imps. They could only spawn if the space I made whilst mining ore was big enough. Got slaughtered by the 2nd worm that showed up though due to not having any space to move, so risky business lol.