Compared to the other 2 dungeons, the bosses in Sastasha HM seems a bit...Unbalanced?

[Kuwagami]

Meh. I would have one-shot Sastasha HM if it wasn't for that stupid dragoon LBing the 2nd boss at pull and then AFKing for the fight... We managed to go down to the last 2 adds before the inevitable wipe (can't protect the team with only one dps).

Qarn was way more difficult, in the sense that people can be very, very blind to obvious things. I had to make a macro with "adds", "guardian", and "boss" to get it done. Even like that, we were at 0.1s to wipe...

So can someone list the mechanic of each bosses and how to encounter this? Rather not deal with a bunch of "deaths" and wipes and making a 30 mnts dungeon becoming 60-90 mnts long slog. Appreciate the tips in advance, and if you could be more specific..

They are really easy honestly if you aren't half braindead :

Boss 1 : stun the tail screw (tank will be stunned just before after 50%, so have a dps do it or have a reactive healer) and esuna/leeches the debuff. Tailscrew will make its target have only 1 HP, so they'll die right after with the debuff if not healed in time.

Boss 2 : kill adds asap. dps the boss when he uses his gun to make him stop (same mechanic as the BLM mog in mog Ex) and kill rooting adds first (the slaves)

Boss 3 : kill the arms to avoid an attack (I never saw what it does, because my group tends to burn everything before thinking). Tentacles stun and throw you if you're too close). The boss shares damage with the arms and tentacles, so you can just dps the arms for the whole fight.