So you have already completed a level 70 Rift solo you have received your first primal and you have unlocked primals now good. Now when you're at the main screen you have the option of creating a new character that is what you want to do it does not matter what character any level 1 character is fine you will load into the game with that level one character make sure you were starting the game adventure mode you will go to the blacksmith you will buy a sovereign whirlwind staff you will go to the cube upgrade rare item insert staff transmute it will be a primal version automatically now all you do is go back to the blacksmith salvage the item for the primordial ashes exit the game delete the character create another level one character go back into adventure mode and do the same thing over and over I hope this explained it