Learning from the Masters

I am getting credit for this on Athanos on the Trial of Loyalty version of Athanos instead of the Trial of Wisdom as stated.

For Athanos

This is a very easy fight as boss is pure melee with Pelagos

Boss abilities
Power swing. He will do a front cone swing that deals large damage and does a knock back so don't stand near edge. This can easily be sidestepped to avoid it.
Massive Charge. He will do a charge in your direction. This can easily be dodged. Also point him in a direction that does not make him go clean across the map.
Shielded Charging. He will take a knee and begin recharging power. During this he will put out a shield that rotates around him. GO to the side without a shield to dps

On wisdom is adds Quaking Shockwave which is an AOE around the boss. It will first do a small inner circle and then a larger outer circle around the boss. This can easily be avoided by being at a range. It will toss you in the air if you get hit.

For Wisdom with Pelagos
https://www.youtube.com/watch?v=8FhH8Nig7VM

For Wisdom with Kleia and Learning from the Masters Achievement
https://www.youtube.com/watch?v=V1mW32VjpLg

For Wisdom With Mikanikos and Learning from the Masters Achievement
https://www.youtube.com/watch?v=shTOwRO1rOo

For Kalisthene

This fight is easy in regards to difficulty.

Boss abilities
tethering spear. This will create a chain between you and the location it is cast you will see an grey swirly indicating this. It cannot be line of sighted this was patched. It will slow movement speed as you try to move away from it and will also drag you into it's AOE which does damage. It can be broken with Herald's footpads equipment. You can use pillars to avoid the dragging effect as they will hold you in place
Ascended Barrage. Kalisthene will fly up into the air and bombard the area you are in with spears. Avoid this at all cost as it is lethal.

On wisdom her new ability is a leap. She will fly up and leap to the blue swirl which will be under your feet. Just move out of the way

For Wisdon With Pelagos
https://www.youtube.com/watch?v=IjMDC07yfak

For Wisdom With Kleia and Learning from the Masters
https://www.youtube.com/watch?v=SbM4OL44YL8

For Wisdom with Mikanikos and Learning from the masters
https://www.youtube.com/watch?v=7Ke1ONZ3hvQ

Contrary to another comment here this has not been fixed. I got this achievement today (5/18/2021) by defeating Athanos on courage difficulty as Kleia and Mikanikos. So until this actually gets fixed you only need rank 3 Path of Ascension to complete this achievement.