Brother Arkio:
Lets pick the oath we like and the leader we need for that. I chipped in with my preferred ones but what are your ideas?
Also did we have new blood incomming boss?
Oath of Knowledge gives us +10 to hit at the cost of your re-rolls. The Squad Modes basically suck for us though - Cover is useless to the Assault Marines. Strongpoint can be pretty good but 30 meters isn't much range for the Center to be behind the Assault Marines.
Regroup and Furious Charge are the better Squad Modes. But they're not actually available together. Furious Charge is only available with Oath of Glory which begets us some bonus renown, if we live. Oath of Loyalty gets us Regroup but +10 to resist Cohesion damage and +1 to Cohesion Challenges is pretty crap but Tactical Spacing can be handy in melee.
Overall, it's a tough call but the combat bonus is the deciding factor to my mind. I think it has to be Oath of Knowledge.