Why do people not understand A8?

[Dement]

honeslty, i've cleared this fight like 9 times now, and i still dunno what this tank swap mechanic is people keep mentioning ? >....>; ive never died in there, so i have no idea..

In the first phase, when he uses perpetual ray he gives a vulnerability debuff on the MT. The safe way to handle it is a tank swap and have the OT take over while the following two missiles land; however, most good tanks can just mitigate through it as long as the healers are on point. The only other tank mechanic really is that double rocket punch can be double tanked to split the damage.