SOHO Router RB750/750G/951

Hi,

I need to connect IoT devices to a router via Wi-Fi, with an RB951/951G or with APs wired to an RB750/750G.
The devices don’t have much traffic but they must be connected and is very important the responsiveness of the devices.
The devices generate low traffic using UDP but continuously (no streaming), but is essential to have low latency and that the router works seamlessly.

I would like to know how many devices can I expect to have connected to a SOHO router working smoothly.?
I should have 50/80/100/150 devices per router, depending on installation size.

Thanks in advance!

Their signal must be of the same level when reaching the Ap and of perfect quality. Then at least 50 can be working on one Ap, maybe more. Have not tried, just guessing from experience.