Blitz is a pretty decent hunk of quanta cost and +1 spell...
So right now,
1 Blitz,
1 Creature
1 momentum
1 PU
X bolts
Looks surprisingly akin to Limitless speed setup to me. Which, while potent, didn't seem to be blatantly OP in vanilla, so I suspect it will be balanced here too... (although innovate makes that analysis precarious... hmmmm)
At any rate, even with just 1 bolt requirement there, its a 5+ card combo. So I have no problem with that really.
As for blessing equivalence, it might be good to check resonator ramp up and go from there.
I guess a place to start would be to have this match up with blessing mid game (say about 12 to 16 plies).
So then there are a few things to consider:
1) what is a good approximation for the average amount of
quanta to be expected by ply 12 to 16.
2) what is a likely upper limit to expect (to handle geores or other life-bolt rushes)
3) when would a deck running this as a side card hit the same quanta threshold
That should give enough info to start engineering the scaling.