Frankly, no, especially with the current limited acquisition of Practo, it’d also leave a question of what about higher rank? Do you need a different ex-practo to upgrade it further or does Practo?
I made a suggestion somewhere before, but basically adds alternate Transcendence that do this, though it only goes up by 1 tier at a time.
Requirement is: 1 extra copy of the weapon (the base version, not transcended ones) + certain amount of gems.
So for example, if you want to have a 8* starter sword, you’d need 8 of them total (1* base, +7 so 7 copies to be sacrificed)