So do you need to complete all the crafting skills on one character to get the "Master Craftsman" title or is it based on legacy characters as well. Meaning, if I have various skills at 450 across multiple characters that add up to the total amount of skills in the game.
All Achievements, including the Master Craftsman, is tracked across your Legacy. So you do not need to complete all crafting skills on one character.
Hope that helps!