BSN, fifth would be an even worse option than third, for several reasons:
1) It's an RBI spot. Crawford is a slap hitter.
2) There's a reason why lineups have been used the way they have been used for years, and part of that has to do with lineup protection. Notice Albert Pujols' IBB%, which has been significantly lower since the Cards got Holliday, it works in your softball team, but in real baseball the manager will put on whoever's ahead of Crawford ten times out of ten on base so they can face Crawford (who can't hit lefties) and even worse if he has Ortiz behind him (who can't hit lefties either) rendering the thought of hitting Crawford ahead of Ortiz worse than injecting your penis with cocaine.
3) Crawford's main asset is speed, speed is better utilized near the top of the lineup, where he will also have more opportunities to bat and create situations per day. I'm glad your double lineup idea worked in softball, but it doesn't seem so effective when applying it to the big boy league for a multitude of reasons.