Again, Deathstroke is impressive, but his armor is simply not as durable or powerful as Master Chief's.
Yes, the plasma bolts and orbital re-entry were blunt force, but that blunt force, as far as I'm concerned, far outclasses the damage of the piercing force potentially applicable in this battle. 4000 feet in the air a SPARTAN-II was able to endure with their shields. It wasn't even stated that the shields wore off after that! And that SPARTAN-II dispatched soldiers right after they landed, without ill effect.
John has constantly been hit with these monsters :
They are designed to tank down aircrafts and large land vehicles. They melt humans in an instant. This thing would dissolve that jet in an instant. Fuel Rod Cannons are also mounted on Hunters. John has shrugged this type of damage off numerous times.
- Exhibit A
- Exhibit B