.7 to .8 is very wide, especially if running higher boosts.
There only needs to be a gap so the lecky can jump, big gaps do nothing power wise, the reason big gaps are associated with coilpack is simply when lean burn tech came out a stronger spark was needed to ignite the harder to ignite weaker mixtures, this was achieved with bigger gaps/better coils.
Try dropping to 0.5mm gap, any resistance to the spark occuring such as a big gap and higher boost will put strain on other parts, as lecky is lazy it will seek the easiest way out, this can be through the rotor arm(arcing) and other things.
Using precious metal plugs like IK27 etc helps massively in this respect, as they fire so much easier.
tabetha