I have found a few topics about having all repeaters but not much information about how that works.
I have a situation where all my nodes (~70) will be full time powered. I would like them to communicate directly to the gateway if possible but have the ability to find alternatives if needed like a self healing mesh.

I need this to have absolutely the best reliablility possible as it will be used in many locations and won't be accessible for management so self healing is quite important. The sensors do not move once installed, except in the odd instance.

Is it ok to have all nodes as repeaters, and if so, will they fix dead routes?