Ketsueki_Hasu
even serving a commoner is fine the main problem is she should have choose an elf or dragon kin as for magic pay points and select all the basic elements maybe a rare element, after all she should at least prepare the foundation to become a god or an immortal after all if she is strong and has lot's of potential, she can change her mistress status at will not to mention you finally got a chance to reincarnate preparing for enternal life is a must, after all are obtained then the next goal should be universe/multiverse transcendence, character who choose based on their current desires are really hard to understand
if you don't choose good talents and potential at the beginning surpassing the system is difficult not to mention surpassing the creator of the system, if that world have a God, does she have the confidence to overthrow all the gods and became the sole ruler not to mention that's just the first step