Anyone have any tips for A2S?

Only just puling 1000dps and I know I should be hitting up towards 1500. Was trying single target with hardhelm/minds based on advice, but was told in game not to (nicely :0) and to just fire 2 everything and save eno rot for widows and jagd.

I am fine in A1S and an only outdone by mnk so I know I can hit good numbers.

I'm not really enjoying A2S but know if I can output what I am capable of it will be a much nicer fight. Any help is appreciated!