False, you can transfer over the marketplace for free.
Not false if you read it correctly... skilling the items FOUND on that character because you have the same Skill Rank, so you do NOT need to transfer via the Marketplace or use a Vault, just skill them as you find them... oh w8, you are talking about group run and finding items right.. well, you just proved another point ... FREE... when you want to skill items, you just get on any of the mules you transferred them to and just skill, and repeat and it is all FREE, meaning it is abusing the game.
Now, if it was transferred to your MAIN skill character, then that is fine, it is just like the old days of HC players having a character that only Skills and another character that only does runs (catacombs).
So... if you have the time to get on another character to Skill those items, why not just the Skill character? What is the difference?
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Now, here is another scenario to think about, even though this is a game:
Username = You are the Parent of your characters (based on your suggestion to combine it as one entity).
How do you teach your children in life to be as Proficient as YOU in YOUR Skill?
Let us say You are a Blacksmith and you have 16 children (your characters) and you teach them Blacksmithing ... are they as proficient as you are at the age of 1, do they instantly get the same experience as you at the age of 1?
Now you are passing this onto the other 15 children... how are they proficient? What experience did they learn? ... or are you saying that you are your children and they are all you?
So... does your children know how to walk before walking etc.
This is a game, they are all YOUR characters, however, they are different characters. Same with all games right... how do you level up any and all of your characters in other games? They don't instantly become level 99 when one of your characters reaches level 99.