The Forge Fire will be a better replacement for that Modern Marvel than the Blitz, and from i've seen out of my Fire it's very useable as long as there is some volume, really digging it.
The Blitz is just different, super early, but continuous, not really comparable to anything else out there, unique piece.
For what you're looking for i'd suggest the Fire, but if you can swing it, both is a good option, just think you'd get more of your desired reaction and use-ability out of the Fire.
I'll report back in a few weeks when i've got my blitz and used it a good bit though.