Well Carlos, I will say that Rooney's strength does NOT go up IG from the "H2H" stats per FUThead. Also, have the Hawk applied to him - 2x PAC/2x SHO/2x HEA.
Based on that for the CBs I would look at a chem style that obviously increase DEF then.
We have a few that we got from packs - Backbone is one of them - will apply that to a CB and check the IG stats (before the apply too
).