Burnas with more Dakka?

I really love my burnas. I have 5. And plan on getting some more bodies making at least 5 more lootas (total 8 +2 spanners) for this list. Is it worth it to make 5 - 10 more burnas?

Or is it so sub optimal that even the pyromaniacs rule of cool is not enough?

I really love my burnas. I have 5. And plan on getting some more bodies making at least 5 more lootas (total 8 +2 spanners) for this list. Is it worth it to make 5 - 10 more burnas?

Or is it so sub optimal that even the pyromaniacs rule of cool is not enough?