i actualy thought of them as Nukes that werent the best, if that makes any sense.

they would be akin to
MP: T3
Damage T3.5
Casting Time: T2

if you had to relate them to current spell casting magic tiers. they were pretty much meant to be a way to encourage the use of Immanence.

Re: to sublmation- actualy just about every regen, refresh, regain ect ect ect, dosent have to be worn once the matching spell or job ability is applied. i see no reason to bar this pattern from sublimation