[quote=@Shadow Dragon]
<Snipped quote by System>

How would one advance a Teir?
[/quote]

It depends on the Tier. A Tier One cannot become a Tier Two without another being performing some sort of soul intervention. A Tier Two can become a Tier Three by attaining some level of ability. A Tier Three can become a Tier Four by independently traversing dimensions. A Tier Four can become a Tier Five by filling out an application and attending the weekly seminar.
*Chuckles*
I jest. All Tier Fives are hand-selected.