She used to be in Discount Frenzy for a little under 30k... Before they changed the partners in there. Anniversary is your best bet since you at least get stones and she is 30k to redeem I believe
rent her then you can still put her in bonds and its much cheaper to put out 400g for that then it is 30k for a partner that you are not even gonna use, unless you actually did plan on using here then go for it but rent her 1st anyway so you dont have to farm exp on her