OROCHIsBLADE
Also, she loaned you 300 low grade energy stones. You could have easily given her 6 mid grade stones. 3 to pay her back, and 3 for another 300 low grade stones and repeated this process over and over again. Heck, you could have given 7, so there would have been a profit. Of course, you would be revealing a secret or two, but your growth rate should make up for that a decent amount.