First boss in Satasha HM

[EricCartmenez]

You're only going to be able to stun him twice before he's "fully resistant", so you should work out who is going to stun before going in so that two people don't stun once and use it up. With decent DPS, he'll get 3 tailspins, so I suggest letting the first tailspin go. The healer will have no problem using esuna/leeches to remove the status effect before hand. The TS will take you to 1% health regardless of how much you have, so making sure people are 100% healed won't matter. Remove the slime, let tailspin happen, heal that player and if you can, do the same for the second one. That way, you're guaranteed, even with OK DPS to stun the next two before you take him down. Let's face it, if you have two bards, limit break isn't going to help finish him off in time.

I just remembered there was no cast bar, this was a while ago though.

I did this fight the first couple days. The cast bar for tailspin was there right away. In order to prevent from multiple stacks of the slime effect, handing off the tank stun is only useful if you have no DPS stun (e.g. two bards).

When his hp is lower he hits like a truck due to an attack buff and maybe gets a new attack that hits really hard? Could it be possible your tank either lost hate or just got murdered by it which let the boss go around 1-shotting people with high damage attacks?

Actually, he just hits more people with slime. If they are close together, you can get more stacks of slime, so stay about 90 degrees from each other on the boss and you'll be OK. The effect of tailspin is the same each time, but the more that have to be removed means that the healer has only so much time to remove each effect and each stack, meaning you may lose people with multiple stacks. Tailspin takes you to 1% health and slime will finish the job.