The concept is rather simple, A option that works only once per account. For roughly 500 tokens you could directly select 1 and only 1 mythical item, This system would help greatly for people who always have one item or so they need for a build. Example: A Coldfire mk1 for a energy build, A Ultranova mk1 for a physical build, ect... Basically giving the player a once time option to just straight up get an item they need.

How it would look:

In the mythical vault upon selecting an item you would see the 3 options:
Silver, Gold, or a Mythical box. But while the 1 time use is unused there would be a 4th option: Direct selection (500 Tokens), upon selecting that option a warning will appears asking the player if they are sure they want that item, as it is not reversible.

The idea would be balanced via the fact it is single use and expensive, 500 could be increased or decreased depending on what is being selected (Example: a Torso would cost more than a module)

Its pretty basic but what do you think?

Instead of it depending on item type, it should depend on performance. For example

Infernal axe: 1000 tokens
Armor breaker mark I and II: 900 tokens
Hellfire armor: 950 tokens

This way, not everyone will be choosing the same item as everyone else

Good idea. Better make it cost 1000 supporters though