Ummm.....
If the bolt can't destroy their crystal armor in one hit and kill them, your design is screwed, Egan. Remember: THEY HAVE FULL-BODY CRYSTAL ARMOR. Also, if we can't kill their bloody crystal platemail with a DIRECT LIGHTNING HIT, we can't kill their cannons and warships with MULTIPLE DIRECT HITS, then we might as well quit, because eS has been taking mental naps while writing Arstotzkan designs (He hasn't, and we know for a FACT that a direct hit will damage crystal. Also, we can kill an unshielded Arstotzky who's lost his antenna/lightning rod/metal stick of bull crap [not actually mad about that. OK, so I am, but it's more a "they countered our lightning" than a "Rifled what?" scenario] in one hit, meaning our lightning works against the crystals, just not against the lightning rods)
Also, guess what Design #1 is for Arstotzka this turn?
BETTER LIGHTNING RODS, probably ones that don't shatter when hit.
So we need to go around them, and/or deploy our own "BECAUSE IT'S MAGIC" and make lightning bolts hit so violently that the metal rods get incinerated along with the soldier in question. But, basically, we MUST not get caught flat-footed here. We can't let them disable our best killing spell. Heretic's Downfall does that and more. We'll not only have complete use of lightning again, we'll also have more POWERFUL lightning, since it will ALMOST ALWAYS HIT, at least with a good roll.