A couple of things actually.
There innate adaptations would give them tendancies towards illusion, camoflauge, and mind magics. So they are using these abilities to protect and defend themselves, as well as entertain and develop a culture.
Their society (and its magic/ technology) are probably related to this. It should be pretty darn alien. (You finally find one of their superweapons and find out it is two silver spheres connected together by a red bead... and you don't have the small key like item and the telepathy to program it).
Given the world they are living on, they are probably hiding from any number of threats, including Black Ones (which their telepathic network would be vunerable) and violent shallow water dwellers. (These people probably live in the deep waters, down by the bottoms, in caves dug out by them and then their drones.
Since they are in a defensive mode, they are hiding mostly in a justified paranoid state, they are trapped in their own little rooms.
(heck their own little city states might be in competition with each other, so they can be afraid of their own neighbors)
Their telepathic network might be better though of as an wireless internet connection rather than a mass mind super computer. (Expanding that, given their golem workforce, they are probably entertaining themselves and designing new intellectual constructs via this network as well).
I would have their telepathic network be an enhancement upon their natural telepathic powers. Maybe these things are all wearing "headsets" which enhance their natural abilities and intellect.
I would think of them more as intellectual couch potatoes. They like being alone, yet like some degree of contact.
Their network would give them a very athenian democracy. Everyone could be seperate and individual, yet they could sharpen their minds through debate. Golem technology could keep them free from daily concerns, allowing them to be elitest intellectuals (the kind that run rampant on our internet). They probably use their "remotes" via this network.
Long ago, someone might of designed a couple of different drones as an experiment. Someone then realized that they could utilize them and built a few. (ew... I don't want to soil my mind with contact against those things... maybe we don't have to, we could use remotes... the little ones would not stop them... so we will build bigger ones...)
I am sure their "cities" are being dug out by silvery crab shaped golems. I am sure their territories are being defened by shark esk golems, backed up by huge monsterous things that keep other huge monsterous things (and smaller dangerous intelligent things) out of their teritories.