This was my first build on a Firestarter (until I moved on to 6ML) and it performed well. Great heat efficiency, low firing duration and decent DPS. It is essentially equivalent to a 4MPL build. The only drawback (other than low alpha) is DAT RANGE. I am hoping that SLs get a range buff to 135 or even 180. If any build is going to try and make SLs viable, it is this one.
This build is VERY viable now. I was able to get over 1000 damage in this, very mean 'mech after the SL buff and with this 'mechs quirks. Extremely fun to run, too! Only difference on my build was I dropped some DHS for some more JJ's, but it still ran at manageable heat levels.