1 Fireblade per HQ slot
Yes the High Yield Missile pod option is twin linked. It is a 4 shot missile pod.
All Ion weapons have the option to 'over-charge' which gives them an extra point of strength, and makes them a blast or large blast (the Ripetide Ion accelerator can over-charge AND 'nova-charge). The over-charge also give Ion weapons the 'gets hot' USR.
Pathfinder Ion Rifle: 30" s7 ap4 rapid fire
Targeting Arrays do not exist any more.
Broadsides get to choose one support system from the list, multi-tracker is one of the options.