Struggling with a regular DL

I have swapped and changed between guys like Dunlap, Morgan, Sheard, Mario Williams and Justin Smith for the first 5 weeks trying to find a constant producer but my search has been in vain.

The scoring is as follows:- Solo Tkl 1, Ast Tkl 0.5, Sack 2.5, Int 2.5, FF 2, FR 2, TD 6, Pass Def 1, safety 2, Block kick 3.5

Here is a list of available players. Who do you reccommend I pick up to be my guy every week? I am only allowed 4 pickups per week and at the moment I am wasting one on a DL every week as its an offence dominated league with 3 IDPs:-

Michael Johnson, Geno Atkins, Chandler Jones, Atyhba Rubin, John Abraham, Michael Bennett, Randy Starks, Brandon Mebane, Kyle Williams, Kroy Biermann, Matt Shaughnessy, Justin Tuck, Osi Umenyiora, Trent Cole, Cliff Avril, Dwight Freeney plus lots lots more who I cannot write here cos it would take all day. There are also guys who are on bye week this week like Charles Johnson, Cameron Jordan, Dwan Edwards, Will Smith, Greg Hardy and Julius Peppers.

What should I do?

DL is a very volatile position. Even the stud players vary a lot from week to week. If you still have Mario, I'd give him one more chance this week. He has a great matchup against Arizona. If he doesn't get it going against the Cards...he may just be useless this year.

I think they're bringing out the old bumber stickers that say, "HONK IF YOU"VE SACKED KOLB!"