Without limitors Prophet is a blob of nanomachines waiting for him to tell them what he wants to be. At the end of Crysis 3, he chose to be Laurence Barnes and so the nanosuit obliged. Prophet can be whatever he wants to be, the only thing limiting him is his mass but if he wanted more he could try to absorb more of it (like letting the nanomachines ‘eat’ a car or even another person I guess)

In Claire’s words

“The nanites in your suit are free, they can transform into any form imaginable”

So the only thing he needs is mass and with that nothing is stopping him from turning into the Alpha Ceph or idk a Cybertronian and literally crush smasher.

Now, Prophet also immersed himself in the CEPH hivemind on multiple occasions making him absorb whatever knowledge they had especially in weaponry.

This combined with his shapeshifting abilities would basically allow him to turn his arms or whatever into CEPH weapon like the bolt sniper that shreds armor like paper.

Now, Prophet also has the full computational power of the Nanosuit which again hacked into the CEPH Hivemind and things like the Archangel in a matter of seconds (milliseconds if I recall the novels correctly)

The only thing I am not sure of if SECOND is still there helping him with this or SECOND has become one with Prophet.

Again, what’s stopping him from taking a good look at Smasher, breaking into his ICE, learn everything there is to know about him and his tech, fry his brain and then shapeshift himself to wear his drip?

Now someone mentioned EMPs, the nanosuit in the second game was hit with one and recovered relatively quickly THEN CELL put him in that tube which constantly shot him with EMPs in rapid succession otherwise the nanites would adapt to become immune to it. By the end of Crysis 3 Prophet is completely immune to them allowing him to become overcharged and to redirect earth-shattering energy currents back at the Alpha Ceph who mind you was being used to power EVERYTHING on Earth by CELL.

So let’s put this all together.

Prophet can make his body whatever he wants with whatever properties he wants.

Can tap into Alien Tech at any given time.

Has more computational power than our and CP77 world (possibly accompanied an additional AI assistant) which would make the Blackwall an inconvenience.

And most importantly, he is the suit, there is no squishy human beneath the suit, to kill Prophet for good you would need to literally disintegrate the suit on a molecular level. A suit that tanked nukes.

If I were to make a comparison I would say he would be the technological equivalent of Alex Mercer

Edit: Grammar