Line up help please.

[ANDYCOCHRANE]

http://fantasygames.sportingnews.com/baseball/stratomatic/2005/team/team_other.html?user_id=28482


This team is post waivers and has a lot of LHP to face. Obviously I need players who are good against LHP, and preferably lefties themselves as division rivals are Shea, Safeco and Skydome. What I was wondering though is how many good players against RHP will I need? In my division 11 pitchers are LH, 5 are RH, about 66% Lefty. Is it worth getting many players like Hafner, Morneau or similar for when I play out of my division?