00:00 - Drox

Drox is for me the most complicated Conqueror. It also requires large DPS in mono target as in clear.
Throughout this boss, try to clear his banners as quickly as possible. These stack with each other, that is to say that they not only reduce the damage suffered by the boss, but also by the creeps, as well as on themselves! So the more banners there are, the harder it will be to remove them.

Remember to only kill the four banners that are around the boss, they are the ones that make him invulnerable.

Attacks:
Be careful to dodge the "loaded in the sky" points, these one shot at just about any non-tanky build. The rest (his attacks and other spells) have little damage, an anti bleeding potion is still recommended, on rock attacks on the flanks.

Phase 1:
Boss alone, few banners, little creep.
This phase is the simplest, with good DPS you can stick everything on the boss, otherwise alternate DPS and clean banners.

Phase 2:
Boss no longer attacking, lots of creeps.
This phase combines the clear and the target mono, try to type the creeps while hitting the boss, and alternating clean banners. This is the most complex phase. Be careful, creeps do a lot of damage!

Phase 3:
Boss alone, a few banners, few creeps.
This phase is also quite simple, alternate clean banners and damage the boss.

05:20 -Baran

Baran is the second toughest conqueror, you have to alternate between dodge and DPS. These spikes on his basic one shot attack also any non-tanky build.

Attacks:
Basic Spell: Throws multiple spikes on the ground, to be avoided at all costs!
AOE to CàC: easier to avoid, you can also take advantage of the boss for DPS while he is charging his attack.
Magic slabs: you take damage and lose mana, be careful if you are playing low mana! You will no longer be able to dash if you stay in it. The instant he charges this attack is the best time for DPS.

Hint:
To differentiate his AOE attack from the slabs, when he charges his attack he aims at the ground if it is the AOE, and follows you if it is the slabs! If you see he's charging his slab attack, just go head-deep DPS!

09:30 - Al-hezmin

Al-hezmin is super simple, once its mechanics are fully understood. During the fight, follow the boss. If he's outside, go to the outside area, then at the phase change pull him inside.
I advise you the soul of immunity to poison, it will be more than profitable to you!
The Conqueror itself has low DPS and most of its damage is in physics (in the video, my build is -60% chaos res, and I tank all of its attacks).

Phase 1:
The boss is outside, follow him. It will pop snakes attacking from a distance in mono target, AOE of poison on the ground. Dodge his attacks while hitting the boss.

Phase 2:
The snakes disappear, others will appear biting at the ACC. Simply pull the boss in the middle, and kill him. Its snakes will be harmless because out of reach!

10:50 -Veritania

Veritania is also a simple conqueror, once the mechanics are understood. His attacks are predictable and therefore rather easy to dodge. I recommend an anti-freeze potion, which will also be very profitable!

Attacks:
Ice spike: some ice spikes, medium DPS, tankable
Ice machine gun: a lot (!) Of ice peaks, to avoid, describe an arc of a circle in order to dodge as well as possible
Ice Tornado: As soon as you see the animation at the ACC, step back!
Ice Dash: The boss rushes at you and freezes you, little damage but combined with his ice pop
Ice pop: the boss appears on you in an explosion of frost, to dodge!

15:40 -Sirus

Good there, it's the big man! It is within the reach of any endgame build, but requires a very good knowledge of its mechanics. After several attempts you should be able to overcome it.

Attacks (form on the ground):
Laser Spike: Low damage, most builds can tank it.
Laser spiker x3: to dodge, these sting! The boss will speak before launching this attack.
Explosive crater: you are teleported under the boss, get out as soon as possible.
Explosive tunnel: ditto, you are teleported into a tunnel, get out as soon as possible!

Attacks (midair form):
Death laser that kills: dodge
Spikes on the ground: same!
Dodge his attacks and pull him towards you to bring him down.

Note:
- Be careful with tornadoes, they hurt (very) even if you are not in the area (being "close" is enough to take damage).
- The video was made before the nerve of tornadoes, you had to pull your tornadoes to open a path, now you have to pull the boss to bring it down to the ground. The rest is unchanged.