Pretty much with the builds above, a few alterations..

I have two keys that I bash, 4 then 3..

4 sets the dots which i've changed now to

SWP Pain, VE
CoE, Immolate, Corruption
Scorch, Scorch, Scorch etc..

So with imp scorch I will build up some fire vulnerability

Then I will bash 3

Mindflay, Mindflay, Mindflay, Mindblast
Shadowbolt x 4 conflagrate
Fireball, Fireball, Fire Blast