Our guild has been running into some seriously ridiculous bugs with these bosses. Below are a list of the ones we'e encountered, most of which have been reported since as early as PTS, still with no fix.
*Stormcaller drops lightning spears on melee during initial phase, even when there is a ranged close to the tank and further away
*Defensive system shell doesn't spawn
*Invisible lightning spears (no indication of it dropping either, you just start taking damage)
*Lightning spears drop INSIDE the defensive system on stormcaller's side, even when the tank is right outside dropping them like normal. (basically the lightning spear mechanics of both phases are active at the same time).
That last one was happening to us repeatedly last night and we had to call the raid. Every attempt, the defensive system would just fill up with lightning spears even WHILE i'm dropping spears outside of the defensive system (i'm the tank). We've killed them several times, are executing the strat flawlessly and are dying to stupid bugs that cause an instant wipe.
This is seriously getting ridiculous -.-
There is a caster inside the shield bubble that drops that lightning shield on the melee group if the aggro is too much on the melee. This can be avoided with threat drops or interrupts. We choose the latter as to guarantee safety. 3 one shots later, we know it works.