If you aren't good with the note powerups, try Blast Notes. The notes it destroys count toward your multipliers, and it's basically hands-off. You hit it, it wipes out notes on the OTHER tracks, and you move on. Better than nothing. I love it with Jackpot because it earns me points and isn't distracting, but it might be decent with Road Rage too for your case.
personally i use:
i am not sure if it is the best or not but since i switched to this combo i have not got less than 5* on any song.
Super Guitar(sometimes a different instrument depending on song)
Jackpot is really the only way to go for 90% of the songs in the game.