Likely to start Lamar Miller unless the injury reports change. I am waiting to see what happens with TJ Yeldon's status. To be honest it's a great matchup so if Lamar is ready to go I think he can do some damage against the Mettenberger Titans, which are clearly far worse than the Chargers wreckage.
Lacy I would not start unless desperate. I think Megatron is a high-upside play (certainly over Lacy) but yeah, completely useless lately. Flex option.
For my flex (for championship) - I can go Megatron, Miller, or C West. Right now I have in C west....he is the clear play when Ware is out, but Ware will play this week. Both Megatron and Miller have shown multiple times they can be extremely low floor (especially lately) but both have very high ceilings.