This simply means a large amount of people have build these cannons without the knowlegde they are weaker in structure/shielding/attack dmg compared to all other defences. (including meh )"Plasma Cannon - 541,709"
I will never again build these, only 1 per planet.
- since 1 can trow off the RF from the others
- since 1 never gets destroyed by the 70% rule. since it seems that 1*0.7=1 in zorg.
(i know this since i raid 1 of all def planets 2x every day for 3 months in row now never destroyed 1 defence structure.)
and whats so bad from upgrading the other defences a bit to make them worthwile to build?, right now you could simply remove them from the game as they appear to have no real function.
Ions=shields
LL= Dmg +(2nd best shielding)
RL=lots of structure points.
the rest is sorta a waste of resources.
anyway way more info here viewtopic.php?f=2&t=3941