Disclaimer: This is not a guide that shows you all the possible tactics. This is how we (Symbiosis) do these fights.
UNDER CONSTRUCTION (30%)
General Stick together when the fight starts, because after a short period of time the bridge towards the boss will collapse. If the tank gets too far from the boss it will jump on them dealing damage and knocking people down.
Resounding shout a.k.a. "Knockback" The boss will knock the entire raid away from him. Make sure you position yourself well so you don't get knocked off the edge. Use movement ability if needed.
Shattering Shockwave a.k.a. "Shockwave" A sticky line telegraph targeted on the tank that will break a platform at the end. Make sure you don't stand too close to the boss.
Corruption Globule a.k.a. "Small bomb" A random person gets infected with this and they have 5 seconds before it explodes which will destroy the platform you're currently on. Walk to an outer platform on the left side of the boss and dash back right before it explodes.
Strain Bomb a.k.a. "Big bomb" A random person gets infected with this and they should jump off the platforms. You'll be propelled upwards again by the bomb and make sure you land somewhere safe. Every 4th big bomb will be on the tank, therefore the 2nd tank will taunt at this point.
Repugnant Spew a.k.a. "Spew" This ability can go into either direction, and because this can be at the same time as the small bomb people should go to the right side of the boss. (small bombs go left remember?)
General Kuralak is immune to taunts. At the start of the fight we'll have 1 person standing behind each of the 6 pillars because Kuralak will shortly after teleport behind one of them. Interrupt her to send her to the center of the room and make your way back. Phase 1: Keep rotating clockwise, avoiding lasers and circle telegraphs. Phase 2(<72%): Lasers disappear, eggs/outbreak/siphon added to boss mechanics.
Putrid Discharge (p1+2) Small circle telegraphs that deal damage and slow you. Avoid them.
Cultivate Corruption a.k.a. "Eggs" -random player becomes an egg, unable to move/cast and deals AOE damage to the raid. -if the egg is not interrupted, the person dies. -the person who interrupts gets a debuff that does DoT but also increase their damage/healing output by 100%. -a person with the debuff will become an egg as well in the next egg phase. (so amount of eggs double with each egg phase: 1-2-4-8-16) -if a person with the debuff dies, a random person will become an egg.
Outbreak Run behind one of the pillars to avoid this 1-shot telegraph. If you have an egg-debuff you have to make sure you go to the same pillar as the raid goes in order to receive heals. (raidleader calls directions)
DNA Siphon This stuns the current tank and channels for a lot of damage. The 2nd tank has to interrupt this cast as soon as possible. The person who interrupts this gains a million threat !