The hue bridge forms its own mini network. Devices on that network repeat for each other, but not for other zigbee devices connected to your smartthings hub. And the reverse is true. The Tradfri plugs connected to your smartthings hub will neither repeat for the devices connected to the hue bridge nor typically interfere with them.
A Smartthings V3 hub can parent up to 64 battery powered zigbee devices. So it comes down to physical placement. If you get more than about 30 feet away from the hub, then you start to need repeaters to pass the Zigbee messages along. So it really comes down to where your sensors are physically located as to where you’ll need to add repeaters.
Read post 11 in the following thread. ( i’ll link directly to that post.) After that, go up to the top of the thread and read those posts and that should give you most of the information you need to lay out a strong “backbone“ for your network. 