Hello. This is a particularly short and simple calculation, could you evaluate it?
vsbattles.fandom.com
(And maybe some feedback incase of inaccuracy?)
Pepsiman moves while falling in slow motion
(And maybe some feedback incase of inaccuracy?)

Personally have no answer about the building thing, but no a character with Fire Manipulation wouldn't have NPI as they just have Fire Manipulation. There are many applications of the ability and they'd need to do something like physically grab the element or something similar to have NPI as opposed to simply generating/controlling flames via an ability.