5 SPOTS, 6 STARTERS WHO TO BENCH? WHIR

[philly_is_back]

I'm having hard time deciding on who to bench? Here are my options? In a roto weekly league.
W,CG,S,K,ERA,WHIP are my stat categories.

Oswalt @home against Cin
Shields @home against CWS
Galarraga @ home against CWS
Saunders @ SEA

Two starters
Lilly @home against COL and STL
Lester @Oak, @ home against BAL

I would have benched lester, but i'm thinking he might do well against Oak and Bal.
Shields/Gallaraga were strong in the last houting
Oswalt has sucked last two outings, but is he a must start always?

[philly_is_back]

anyone?