Having trouble finding a defensive identity

I am in an online franchise, year 2, and I've been using a 4-6 defense with delayed bump and run, but users are still able to pass on me quite a bit. Does the 4-6 fit my team? Would another defense work better? Any plays I should try?
Here's my defensive lineup.
DE-Amobi Okoye (81)
DT-BJ Raji (86)
DT-Sedrick Ellis (89)
DE-Mario Williams (96)
LOLB-Manny Lawson (75)
MLB-Lawrence Timmons (83)
ROLB-Clint Sintim (81)
CB-Dominique Rodgers-Cromartie (92)
CB-Vontae Davis (83)
CB-Orlando Scandrick (79)
FS-Laron Landry (88)
SS-Brandon Meriweather (82)

i think you can play in the nickle because you LB's arent that lovely lol. DRC can play in BNR idk bout vonte's and orlando but my best guess is that you try and get a scheme in the nickle package

Play some zone d....better yet how about try what is labeled F@G-D? Where you put like 9-10 guys in coverage. Change your D-Line to play zone.....but you do have a d-line to get pressure, but its good to mix up coverage so that your opponent doesnt get too comfortable against you. I like it when guys use a nano-d that blitzes right up the middle. I have a great play that is very effective in hurtin' that type of D. Anyway, mix it up and I'm sure you'll see improvements in your D.

STAY IN NICKEL MIX IT UP WITH BLITZ AND ZONE TO CONFUSE EM

do what broadwae....say do...but you gota mix them up....keep them on there toe's...