Duck, several things myself
The Selkath Seperatists joined the collective about 80 years ago now. You imply magical knowledge was gained by the Equestrians by essentially studying and experimenting. Well, that's 80 years experience and more on top of that from their time with the Equestrians, they might not be the best but I think they will know enough to be useful in a military role (And definitely know enough for what the Collective wants to use them for)
Your understanding is clearly not extensive. They all have the potential to do it, the same way all could potentially stop lasers and other attacks. How come Triarii still get killed by lasers and can still be killed by magical attacks? The laws of conservation of energy. The energy they are manipulating has to go somewhere, it doesn't just disappear. It gets transferred through their nervous system and transferred back out (they are able to store smaller amounts of energy, which is obviously needed to conduct their ability)
Now, stopping a single laser is one thing, how about stopping half a dozen? As with all energy transfers there is waste energy. The more energy, the more waste. So that's the first problem, high amounts of waste energy inside the body could easily upset the bodies internal homeostasis and thus the enzymes would cease functioning correctly. The second problem is the energy its self. If you pass 200000 through a industrial power cable it will hold, if you pass 10000000 through it it will melt and fry. If you fry your nervous systems you are fucked. Their nervous system was almost entirely restructured when they were in service to the Aetherii so they would have a better chance of passing energy through their bodies and surviving. Their muscle was decreased to allow waste energy to transfer to the outside quicker, their large eyes linked to the nervous system so waste energy could be deposited out (That's one of the reasons for the glow, escaping light energy) and their enzymes were modified heavily, working at a wider range of temperatures (but much less efficient, though this isn't too much of a problem since they can absorb energy and so have a reduced reliance on consumption. Obviously they still need minerals and vitamins too, so its not completely removed. Their reliance was instead weighted towards drinking, given the liquid on Triarius that contains a large number of minerals) Their original form was not as frail, it became so out of necessity to accommodate the power of the psionics they got from the Aetherii
The energy transfer is why Equitem planning to rely heavily on their abilities work in teams, that way they can share the energy between them, reducing the strain on each individual and thus allowing them to utilise their abilities on a grand scale. The Primicerii don't just link themselves in the meetings to boost their strength, its to deal with the excess and the strain from receiving and sending several trillion signals.
The Selkath Seperatists joined the collective about 80 years ago now. You imply magical knowledge was gained by the Equestrians by essentially studying and experimenting. Well, that's 80 years experience and more on top of that from their time with the Equestrians, they might not be the best but I think they will know enough to be useful in a military role (And definitely know enough for what the Collective wants to use them for)
Your understanding is clearly not extensive. They all have the potential to do it, the same way all could potentially stop lasers and other attacks. How come Triarii still get killed by lasers and can still be killed by magical attacks? The laws of conservation of energy. The energy they are manipulating has to go somewhere, it doesn't just disappear. It gets transferred through their nervous system and transferred back out (they are able to store smaller amounts of energy, which is obviously needed to conduct their ability)
Now, stopping a single laser is one thing, how about stopping half a dozen? As with all energy transfers there is waste energy. The more energy, the more waste. So that's the first problem, high amounts of waste energy inside the body could easily upset the bodies internal homeostasis and thus the enzymes would cease functioning correctly. The second problem is the energy its self. If you pass 200000 through a industrial power cable it will hold, if you pass 10000000 through it it will melt and fry. If you fry your nervous systems you are fucked. Their nervous system was almost entirely restructured when they were in service to the Aetherii so they would have a better chance of passing energy through their bodies and surviving. Their muscle was decreased to allow waste energy to transfer to the outside quicker, their large eyes linked to the nervous system so waste energy could be deposited out (That's one of the reasons for the glow, escaping light energy) and their enzymes were modified heavily, working at a wider range of temperatures (but much less efficient, though this isn't too much of a problem since they can absorb energy and so have a reduced reliance on consumption. Obviously they still need minerals and vitamins too, so its not completely removed. Their reliance was instead weighted towards drinking, given the liquid on Triarius that contains a large number of minerals) Their original form was not as frail, it became so out of necessity to accommodate the power of the psionics they got from the Aetherii
The energy transfer is why Equitem planning to rely heavily on their abilities work in teams, that way they can share the energy between them, reducing the strain on each individual and thus allowing them to utilise their abilities on a grand scale. The Primicerii don't just link themselves in the meetings to boost their strength, its to deal with the excess and the strain from receiving and sending several trillion signals.