I use a hardhat liner inside my helmet, it allows a bit of space between the top of my head and the top of my bucket so air can circulate better, also no need for a chin strap. The armor is fine but I wouldn't go fighting people in it or rolling around the ground. I am jealous of people who can sit in their armor whereas I can barely do stairs with a handrail.
Next time I am getting ready for a troop, I'll take photos of my full electronics setup. I put a bit of velcro on my wireless mid and it stays put inside my helmet. Fans are attached with velcro and on a mount. Battery is secured with velcro. You just gotta walk around with your full kit and learn what works for you. Trim away pinch points and get it all dialed in.