The game allows a fixed number of the current tomestone per week and no amount of play changes that. Any honest gearing order works the cap and then waits for the reset, exactly like Mists valor. Anybody quoting a full set in two days is describing a game that does not exist.
A full best-in-slot set is savage drops plus capped tomestones plus crafted pieces plus melds, and the lockouts are what set the pace. It is the most expensive single row in this game outside an Ultimate and the estimate on it is honest about why.
Every relic line in this game is a long chain of steps, most of them gated behind content from the expansion it belongs to. They are priced by the line rather than by the step, because a half-finished relic is not a product anybody wants.