SIX?? Wow.
I think in that case, besides the excellent hoop run you posted, I would put up some electric fence. You want to make it hard for them to get even close to the run and coop. Nothing is Fort Knox, even though lots of us claim to have a Fort Knox coop

and most of us aren't up against a threat like you have.
Looks like a pretty good build.
I ASSUME you are going to cover the sidewall vent areas with 1/2" hardware cloth.
What is the size of the chicken door? I would research auto doors (in case you ever want to put one in) and make the door that size for easy modification
I would put something between the ground and the bottom of the coop to keep the chickens out of that space. You really don't want to try and retrieve eggs OR chickens from a space with that little headroom.