I think that a good new element to add would be something which is similar to a powered clone producing TRON; except the "TRON" released would travel in a straight line, and have a life similar to BRAY. You should be able to set the life of the "powered clone", so that when it is sparked the "TRON" created has the life that the "powered clone" has. When the life runs out, the "TRON" should dissappear and spark any electronics near it. This would be good because if you had a large grid of LCD for example and you needed to spark a particular LCD particle, you could use the life property of the "powered clone" to choose which LCD is sparked.
Maybe if the "TRON" takes too long to reach the desired LCD then it could occur instantly as oppose to losing one life every frame.

I think that another similar element could be SPark ARay, which sparks nearby elements where rays collide, just like BRAY makes points where rays collide. This would have the same purpose as the elements i just mentioned, except with collisions with other spark brays as oppose to releasing spark when the life reaches 0.