Is cannon cannon piercing any good, for a spinal weapon? or should i go cannon, pulse, ????? never built a spinal weapon, most of my primary weapons are missiles of some kind.
Piercing reduces shield damage, basically the worst choice for alpha damage, better go with ion, as Jarraf said. Also, more reload time means more damage per hit. Beam/beam has 3 km range and triple damage/relaod, cannon/beam has 6 km range (if you can hit at that distance!), double projectile speed and quadruple damage/reload, cannon/pulse has 2 km range but 16 times the damage/reload. Note that without slaves beams have 5 times as much damage per pulse as cannons have per shot, but also five times the reload. It basically boils down to the range you want and if you can hit your targets at that range with cannons reliably.