BLMs are not good with parsers due to the large amount of fluctuation you have in a short timeframe such as 3-4 minutes. However you can't neglect procs either, RNG is RNG but statistically it all should work out nicely.
I wouldn't worry about your dummy DPS unless you literally want to make multiple parses with a time over 10 minutes. Most of BLM DPS comes from how you manage your procs in a real scenario anyway, not how much you dummy for.