I have a total of 12 Deco E4s (one network; router mode; ethernet backhaul; connected to Huawei F670L- ISP Router) set to provide wifi to an entire building. 

We have no problem in internet speed so far, but I noticed that CPU load is at 100% and the Deco app keeps crashing. Is it due to too much Decos in the network? 

I plan to separate the current network into 2 networks running as AP Mode with 6 decos each connected to a root router for more control and more security features.

Can anyone suggest a TP Link Router suitable to act as DHCP server for 2 networks of 6 decos running on AP? I am currently looking at the TP Archer line-up, but am confused what is powerful enough and what is overkill. I don't want to break the bank for features I may not need.

Criteria for Root Router:

- Able to run up to 100 devices or more for future proofing purposes.

- can assign IP address to registered devices

- can distribute 300mbps via wifi reliably via the root router (not the decos). I don't mind that the decos are capped at 100mbps via ethernet backhaul.

Any feedback is much appreciated! Thank you very much!