That's an extremely interesting thought but here are my counter thoughts:
1.) Once you waaagh the first time, you've pretty much made it
I second this. While not always possible, I've done this before and it makes things easier. What I do is paint the white stripe, then a vertical dark
Why not make them Salvo 2/4?
Keep in mind that points aren't equal between Fantasy and 40k. 2000 points is on the smaller end of big battles in Fantasy whereas 2000 is on the larger
I reckon CSM are probably the best bet - specifically, if you want some fire support that really enjoys Prescience try a Hades Forgefiend. Very little