NOT! If you're going to make any real money, you need to make significant, unhedged bets on direction and be correct about it.
"Playing for rebates", "trying to narrow the spread", "seeking slightly lower commissions"... are all "niggling" incidentals. If that's your play, you might as well park your dough in T-Bills and go fishing.
IOW... You can't "pussyfoot your way to financial success"... if rebates and trying to capture a piece of the spread are your objectives, you're doing it wrong. Those things are incidentals. If you get them to your benefit, that's great... but they won't do much for your P/L bottom line.