The idea as the title states is for a set of missions that unlock the professions for all races to be able to use. I'd see these as being similar in difficulty as the race unlocking missions with the professions the majority of races already have unlocked being easy and the rarer ones needing major effort to unlock. The prereqs would be you are currently the profession that you wish to unlock such as saboteur to unlock it for other races. Since Sabs are currently only one race they'd have the most requirements such as 200 completions costing 300 energy and a dark void foci each.

Said mission would take FOREVER... Especially considering dark void foci are non tradeable

yes but it would be for unlocking Saboteurs for all races which is why it would take that long.

But they are share able.