We have the tank taking charge basically in melee range for charge now since I switched to nin (we thought distance from charge correlated to damage taken back then). So it's not this.
The boss does crackle hiss before he moves after a charge in the second phase, so where he's tanked shouldn't affect anything.
War MT/Pld MT same stuff, we had Pld MT our first day or two of attempts.
Definitely not getting hit by someone else's heat lightning.
It could be the amount the boss turns... The boss might be a keyboard turner. In the video I watched after the charge the boss took his sweet ass time turning around 180 degrees before he crackle hissed. Whereas with us he's only turning 90 degrees. That difference in time would be the 0.5 seconds that results in other groups never seeing this happen, since like I said we only ever see this sometimes when the OT gets heat lightning last and vulnerability is basically at 0s left. To lend credit to this.. have you ever had the MT accidentally regain aggro during the charge due to dots or something? The boss will immediately crackle hiss right after the charge killing everyone he just hit.
The PLD is the OT, so he's the one getting hissed, not the warrior. Besides hallowed (wherein he'd just take the charge instead of tank swapping), I don't see his cooldowns doing much against the 15k+ hit that you take with vulnerability.I've seen this happen before. We just have the Warrior blow vengeance for the charge instead of potentially dealing with the spaghetti of vuln not falling off.