But they don't matter if they're not within range. We're in the riverbed right now. I'd be surprised if they could fire on us. No reason not to take out all the slaves first and then advance on the camp together.
Edit: If they are within range, my last point applies anyway, so the matter is secured (Move as fast as possible when within range of 7, try to tie up enemy units with some of your own to get to 7 faster)
Edit2: and I hope the point (1/3 and 2 help 4 when 6 is dead and no other enemies are running towards you) is understood that 123 does not help 4 if they are under fire from 7
Even if we are not finished with 6 yet, when 7 somehow comes within reach, I hope Bragg ties up the remaining slaves with a unit and takes out 7 as quickly as possible
Though if we can collapse on 7 isn't their leadership a bigger priority? Would the gatlings not get some debuff if fighting in one big melee?