Considering the team's defensive woes whether Pokey's been in the game or not, I'm shocked that you're willing to add another black hole to the lineup for an improvement at one position. Daubach's no better than Millar when you have him face LHP, he actually might be a bit worse, and I'm not a Millar fan.
Also, given that this is Youk's first year in the big leagues, he doesn't technically have a history of OBP at this level. He may be building one now, but he doesn't have it quite yet. Mueller has also always been more comfortable hitting lower in the order, so you can't really plug him in at #2. I really don't think that the top 4 of our order can be optimized any more than it already has been.
1) Damon (Speed, OBP)
2) Bellhorn (OBP, some power)
3) Ortiz (Two OBP guys in front = runs!)
4) Manny (Just for when Ortiz misses)
If you're desperate to get Pokey in the lineup, then put Bellhorn at 3B and have Pokey at 2B, or have Nomar DH with Ortiz at 1B, Bellhorn at 2B, and Pokey at SS. In one case, you have no Youk/Mueller, and in the other, you get Ortiz fielding. I'm not sure that those negatives don't overwhelm Pokey's defensive contributions.