Would only work if you use fire staff on one bar and lightening on the other but you would probably be better off replacing one of the sets with Julianos or Sloads
BSW gives higher burst, with the average Spell Damage increase being about 350 if you can proc it reliably. Fire sets can proc it and vice versa (Ilambris/Skoria/Groth), you can also proc it with a fire glyph on a shock staff, but your proc rate will be lower.
Jule's if you want more consistency with a slight loss.
The difference will be negligible, so if you have it, run it.
Just because you don't like the way something is doesn't necessarily make it wrong...
Earn it.
IRL'ing for a while for assorted reasons, in forum, and in game.
I am neither warm, nor fuzzy...
Probably has checkbox on Customer Service profile that say High Aggro, 99% immunity to BS