Sounds the opposite use of a spire, why would you need so many engineers when the real deal is in using all of its guns?
The moment you go to repair is after you fired your guns or when fleeing.
Infact, you wont be able to flee unless the kyro spire is there, but then you wont be able to dodge if you dont have the hydro guy there.
Pilot engie wont be able to meneuver much, specialy how pheonix claw will help the spire turn and then move into cover.
Kyrosine doesnt give, better turning... It is also overly complicated to command, usable with a clan or a group of other 3 people who are in on it but not practical in general, or dynamicly based on the map/Enemy ships. The standard pilot-engie-engie-Gunner works on every build, and because of the roles, the players themselves dont change much.
I would say that this build works as a sniper versus other snipers, because being shot at is to be expected. Other than that, the purpose seems more amplified with the standard setup.