Jax was inherently strong to begin with, and with the Navi stage he improved, his strength improved exponentially as well.
As a result, even at just 4-Star Opal Stage, he was already capable of easily carrying 200 slimes. Given how balanced the armor was, it was even easier to handle it.
Using Body Fortification to amplify his strength, carrying the armor became far easier. He could easily walk around with it as long as he had the Body Fortification active.
And then, to make it even lighter, Jax used his third Skill.
Featherweight Armor.
Navi flowed out of his sea, passing through the many circuits along his body as it made its way to his skin. From there, without any control from Jax, it flowed into the armor around him, immediately reducing its weight by nearly two-thirds. Perhaps even more.
With so much weight reduced, Jax could easily move around.
