the theory is sound, but may I suggest, do not waste gifted levels on toons below level 30, it's just too easy and fast to get there and honestly it only takes 4 hours to get to 20, maybe higher since you'll have a 70 running stocks and deadmines. You may be cutting yourself short on the amount of 60's gifting from 1 - 60. Also, I do not believe you get to gift levels that the toon was gifted, only levels which they actually earned, I also may be wrong on that since I just started also.