How do you build a lineup?

[ERICTAYLOR 2]

Geekor's theory above is pretty close to what I do as well...

[1crazycanuk]

I got rid of Thomas. Is this an effective lineup?:

Lineup vs. LHP
CHANGE THIS LINEUP
1. Castillo, Luis (S) 2B
2. Giles, Brian (L) RF
3. Hafner, Travis (L) DH
4. Overbay, Lyle (L) 1B
5. Jones, Andruw (R) CF
6. Glaus, Troy (R) 3B
7. Klesko, Ryan (L) LF
8. Ausmus, Brad (R) C
9. Izturis, Cesar (S) SS

CHANGE THIS LINEUP
Lineup vs. RHP
CHANGE THIS LINEUP
1. Giles, Brian (L) RF
2. Castillo, Luis (S) 2B
3. Hafner, Travis (L) DH
4. Overbay, Lyle (L) 1B
5. Klesko, Ryan (L) LF
6. Glaus, Troy (R) 3B
7. Jones, Andruw (R) CF
8. Mayne, Brent (L) C
9. Izturis, Cesar (S) SS

CHANGE THIS LINEUP

There aren't a whole lot of pitchers that are stronger against lefty hitters in my division so I'm thinking I will be ok with three lefty hitters in a row in my lineup. Castillo and Giles are staying one and two for their speed but I will listen to advice regarding the rest of my batting order.