What's a good gun for Ash? I got systems and chassis cooking up at the moment... For melee I suppose Galatine could work and I also got a blueprint for Dark Sword which I hear works for him.
Next up: Saryn. That frame looks so awesome.
Ash is just straight up built for melee, so any long range weapon as a main weapon compliments him well.
A fully modded Galatine (all charge damage and charge speed) will wreck shit with the "sneak attack" bonus from Smoke Bomb invisibility, and as an added bonus enemies can't target you.
Power Efficiency and Power Duration mods also work well on Ash, because they make his Smoke Bomb essentially spammable.