I think we'll be using 3 at the back.
Mignolet
Skrtel - Sakho - Agger
Johnson - Lucas - Gerrard - Enrique
Coutinho
Suarez --- Sturridge
That's the most balanced team if we go with a 3-4-1-2/3-5-2. Obviously we can have Cissokho as the LWB if he turns out better in attack than Enrique. It doesn't really matter who the third CB is between Skrtel, Kolo or Ilori.
OR
Mignolet
Toure - Sakho - Agger
Johnson - Lucas - Gerrard - Hendo
Coutinho
Suarez --- Sturridge
This one is my personal favorite as you have Hendo starting. What this allows us to do is interchange between 5 at the back and 4 at the back more smoothly. If need be Agger/Sakho can move to the left and Johnson can drop back as a RB then you've got our natural formation we're using right now 4-2-3-1. Hendo in this line up will not necessarily be a left wingback but more of a LM/LCM (left midfielder). I like Johnson in this formation because he offers more than Enrique attacking wise but if need be we could easily just do this by dropping Gleninho and having Hendo as RM/RCM and playing Enrique as the left wing back, kind of like so
Mignolet
Ilori - Sakho - Agger
Hendo - Lucas - Gerrard - Enrique
Coutinho
Suarez --- Sturridge
What this formation also does, it maximizes Coutinho's ability to get involved more often. We know our attack is fluid and love to interchange positions during the course of the match. Well Coutinho now has the freedom to roam 360 degrees all around the attack. Playing him on the left minimizes his ability to get involved. Sure he has a little more room on the wing to operate since it's a clusterf*ck in the middle of the pitch with so many bodies. However, on the wing Coutinho is limited to only 180 degrees of passing lanes, and all of the play is to his right which means defenders can read his moves much easier. To make my point on this clear, you just have to wait for Suarez to come back then defenses cannot gamble on marking Cou with 2/3 guys because Suarez will be a menace if left unmarked.
Another thing this formation does is it never leaves Sturridge stranded by himself up top if we decide to hold on to 1 goal leads and park the bus. You now have Suarez also causing havoc up top with him and harassing defenders with his presence alongside Studge. In the 3 games so far once we decided to hold on to our lead Studge was basically rendered useless in attack as he's all by himself and any competent back 4 can deal with one guy.
And finally our biggest problem with our fullbacks could potentially be solved. Both Enrique and Johnson love to maraud forward leaving tons of space behind. Well now you have 3 CBs and Lucas covering for them when they do it, and it gives them much more freedom to express themselves without fearing the oppositions counter attacks.
For the Swansea match after the break I'd love to see
Mignolet
Skrtel - Sakho - Agger
Hendo - Lucas - Gerrard - Enrique
Coutinho
Moses --- Sturridge
Skrtel needs to be rewarded for his great performance against Yanited. And this is assuming we don't want to Rush Kolo and Glen back from their injuries. As for having Moses ahead of Aspas is just he's much more physical and pacier than Iago which could help stretch the defense.