Strategy question...

[LeftyQB]

I'm in 6th place in a 10 team Yahoo league. Roster and league info are below. Since we need to use 3 SP's, 2 RP's and 3 either SP or RP...Should I use both of my closers (Williamson & DeJean) or should I use one closer ad Webb, which will allow me to put another starter in? Any advice?
1b - Sexson
2b - E. Young
SS - A-Rod
3b - Rolen
OF - Giles, Suzuki, Kearns
C - Posada
Util - Hildago, Damon
Bench - Grissom, Winn, Relaford
SP - Mussina, Schmidt, Nomo
RP - Webb, Williamson
P - Sabathia, O. Perez, Buehrle
Bench - Glavine, DeJean
Yahoo league, 10 team, non-keeper
Point system:
1b = 1 pt
2b = 2 pts
3b = 3 pts
HR - 4 pts
RBI - 1 pt
BB = 1 pt
R = 1 pt
SB =2 pts
Win = 8 pts
Save = 7 pts
CG = 5 pts
Hold = 4 pts
IP = 2 pts
K = 1 pt
ER = -1 pt
Hit = -.5 pt
BB = -.5 pt
Thanks, Dan