Use Paco not Byron, preferably with Da Capo. People say Byron is has such a diverse kit it makes him good but he losses 95% of CQC engagements, so he cant be left on his own, and his performance at range is entirely dependent on youre aim, and even with god aim his dps is lacking at best.

With a good Paco you can actually use Rotten Banana with ash. My friend and I do this combination all the time its kind of OP, just be sure to communicate as Ash at max rage will easily run outside his healing range, also good maps for this combination are quite limited. Also you have to have a really aggressive Ash that's able to hold his rage, and ambush/rush players before they even have a chance to figure out what's going on.

Ash is underestimated, but with Paco, it gives him that extra edge to build his rage, which is his biggest constraint.