So after my previous post I managed to re-do my setup and I got a functioning 15k PA from Oritech. I'm putting this post out for any suggestions and to hopefully help others that had to spend 3 days tinkering around what works and what doesn't.
I don't claim this is the best or most efficient way to do it but it works for me and I think it looks quite neat. It consistently gets to above 15k Js per collision and so far I haven't experienced misses despite using 2 accelerated particles.
The set up has 42 guide rings per side (12 on the internal rings; 30 on the external) and 24 linear motors (8 internal and 16 external) with 7 more guide rings going from the smaller to the bigger circle and for the collision itself. The switches are using redstone logic controls set to emit on 8 and 12 respectively. And LaserIO's easy enough to set up to send out the particles simultaneously.
I haven't tweaked it around too much so I'm sure the size and number of rings can be switched around but it's not a priority currently.
One thing to note is that putting node overclockers in the laser nodes in ANY spot breaks the entire system and causes all particles to constantly miss.
I hope this is useful for someone and as I said I'm open to suggestions how to improve it. I'll get around to automating it with AE2 at some point but it's a viable set up for manual work as well.
by Aestuosus