Let's start with Sundered Nexus that's coming out soon:
First miniboss: Surrounded by 12 adds, wounded but all of them are immune. The objective is to take a bomb and throw it at the correct target, this will despawn all the adds and remove the miniboss's shield, otherwise all the enemies in the room heal by 10%. If the incorrect mob is hit, he will clue in on the correct mob: if he is launched into the air, the correct target is somewhere to his right; if he is knocked down, the correct target is somewhere to his left.
Don't just take the bomb, throw it at random people, and pray to RNJesus that person is the right one. No, boss has 3 million HP if he heals all the way.
First boss (Drill Sergeant):
Rotation: Normal swipe (yellow) -> multi-hit frontal attack (yellow) -> three aoe jumps (red) -> normal swipe -> multi-hit frontal attack -> charge around the room (block this to stop him).
At some point he will stop his regular rotation and then spin and throw two discs at random people. Everyone needs to huddle up and prepare to block the discs. If they are not blocked, they will continuously bounce around the room and hit like a truck.
He will then jump into the middle of the room and try to get a buff.
He will generate three auras; he needs to be double CC'd on the corresponding aura (Red = Daze, Blue = Stun, Green = Knockback), otherwise the game tells you what CC to use. He will do all three in a random order.
If he is successfully stopped, he will do a small yellow aoe before falling down~20 seconds and generate a focus recovery field; DO NOT mount or pick him up until it nears the end of his knockdown or he will get back up and waste free unhindered DPS.
If he is not stopped, he gets a 90% damage reduction shield that can only be removed from stopping the next buff attempt.
Second boss (Be Ido):
Divided into three phases: the first phase is literally a DPS rush with a spin2win UFO.
On the second phase, he rides on a Soulstone Plains Driller with frontal swings, a laser, and a spin2win that is CC'able.
Starting at 90% he will fire six missiles at the furthest person from him (typically the ranged).
The person being targeted must run around the boss so they land around him, and must also keep the missiles from directly landing on top of each other or they blow up and everyone immediately wipes.
After shooting the missiles he will charge toward the tank; block this to stun him.
In the meanwhile, everyone else must destroy the missiles; they generate a blue field that gives 10 second 100% critical damage if the boss is in them.
After firing the missiles and his charge is stopped, he will perform small red multiple quake attacks that get larger with every use.
If a missile from the previous part is present when he does his quake attack, it blows up and everyone immediately wipes.
He will also summon four adds that move close to the boss. If they get close enough they will prepare to give the boss a stack buff; if this reaches 5 stacks he immediately enrages and wipes everyone. He will kill the adds with his quake attack, but is also CC'able during the attack as well, so don't do it until all the adds are dead.
Starting at 50%:
After the quakes he will do three more field-wide quakes in quick succession.
He gains a permanent 90% damage reduction shield that can only be removed from the missile aura.
Third phase is just Be Ido by himself. He has no adds, no elemental shield, and 200k HP, he just stands there and hits his emergency escape button.
Don't mindlessly throw bombs at random, don't mindlessly CC at random, and ranged must actually kite. Mistakes are no longer forgiving at this point.