Myself and a few others are seeking to master the profession and I put forth the theory that since an expert trader can use 20 merch points to “summon” a guild representitive, that this might secure a consistant way to get training for mastery.
No. A Guild will negotiate and decide when and if to progress a member’s training. Remember that a Guild can decide to wipe away one’s merch points and even remove a character’s status in their own Guild.
edit: This is not to say that it is solely up to the Guild to decide whether a member is ready or not, but they are not up to a member’s beck and call — but the opposite, especially considering that a Guildmember’s stipend is derived from the Guild itself.
Training progression is otherwise like most Training.