I haven't a clue on hemalurgy and its abilities. I mean the speed was "non-allomantic" as Vin said so then what was it? Was it increased strength from Feruchemy and burned Pewter at the same time? I'm lost. It was almost as if it was different all together. Idk. I will be of no help in this discussion.
I feel just as lost--me and Chaos2561 talked a little about this via messenger and we have concluded that Vin is a hemulurgist as well as an Allomancer--for an explanation look into the Hemalurgy thread.
She can do things that other Allomancers can do because of the fact.
So hemalurgy must infact increase the ability of the body in the same through the pierced metals--question is though, how?
Allomancers swallow and then burn the metal, feruchemists store their OWN energy within the metals.
One uses energy that the metal already has, the other filling the energy into the metal first.
So i would guess that in hemalurgy--since the spikes never burn away like in allomancy--that the spikes also draw on energy, but since inquistors are never weak--as far as we know--the energy must not be there own.
Thus i think that the spikes suck energy from an outside, consist energy.
The mist.
It is all in the theory of the conservation of matter.
Allomancy takes the metals that have already NATURALLY taken those energies and burned them back into the atmosphere--thus the mist is attracted to it.
the spikes suck the energy and provide--first life to the should be dead inquistor--and strength.
and since they have an unlimited supply, they can flare it. Its not like they will be exhausted after the fact...
but thats just my theory.