But I can not stay away from the HIGH guarantees or $10+ R+A, where I have had no success.
I think you answered your own question. If you are not having success in these tournaments, it might be that you aren't ready to move up to that buy in. Especially in a rebuy/add on, where it is likely you will need to put more than the original $10 into the tournament. Not sure where you are playing, but on ACR, they have a lot of really cheap, but really decent guarantees.
Also, you mentioned your bankroll is always around $100. Is is getting bigger, and you are withdrawing funds? Or does it get smaller/do you bust and reload? Or, do you just kind of go up and down, around that $100, never really losing or winning much? If you aren't building up your bankroll, which you would need to do in order to start putting money into bigger tournaments, you should try to figure out what you are doing wrong, and what you need to do to get to that next level.