The 6c catches everyone, but there are some characters where you don't do a d.6c since it will whiff such as with carl. The 6c , j.d won't catch anyone at all... I tried..
And yeah you can start with it with a 5a.
Something else I just found out is that
5b, 2b, 2c, 2369c, d.6c, j.623b, V, d.5b, 2b, 623b.
The 2b isn't that reliable in this, they'll tech out before the 2b hits. Also you don't have to do the d.5b, you can just input it in there since they'll bounce back to Bang. I'm trying to find another move to follow up that 5b.
also the damage so far from
5b, 2b, 2c, 2369c, d.6c, j.623b, V, d.5b is 2744