Glory of the Dream Raider

A brief rundown of each achievement, check the individual achievements for more detailed guides.

Meaner Pastures
On Gnarlroot in the second phase when you should burn the roots instead burn 8 blue flowers around the outside of the arena. Once all are burned, burn the roots as normal and kill the boss.

Cruelty Free
On Igira drop a spear on 3 large pots to the left and right of the encounter area. This can be done during any of the spear phases and don't need to be done at the same time. Kill boss as normal afterwards.

Swog Champion
On Volcross collect a horn to the right of the stairs before engaging the boss, then activate it in the fight. A large frog will spawn small frogs which will chase people. Take the small frogs to the tank and Volcross will eat them. Once Volcross has eaten 30 kill the boss. You can track how many have been eaten with a buff on the boss.

Don't Let the Doe Hit You On The Way Out
On Larodar heal up a small doe to the right before the boss arena then herd it to the fight. Engage the boss and cleanse 70 stacks off the doe with the fire cleaning mechanic, and keep the doe alive and out of danger the entire fight. Once 70 stacks have been cleansed kill the boss.

Ducks In A Row
On Council gather the entire raid under Sergeant Quackers to the left of the arena with the aim of getting everyone polymorphed. This one may take a few goes so read the full comments.
Once Quackers has joined the fight kill the bosses as normal.

A Dream Within a Dream
On Nymue collect 5 butterflies while in the /sleep dreaming state. Once 5 have been collected a large moth will spawn, kill it and then kill the boss.

Haven't We Done This Before?
On Smolderon get 6 (or more) people to collect a buff at the pool at the start of the instance, then douse 6 runes around the inner circle of the boss arena with the extra action button. You take damage for each rune so spread them out. Once all 6 are doused kill the boss as normal.

Whelp, I'm Lost
On Tindral during the 2 flying phases collect 6 Lost Whelplings in the large world tree. Once all 6 have been collected kill the boss as normal.

Memories of Teldrassil
On Fryakk you'll need to collect 6 Wisps around the starting and Council/Nymue areas of the instance before engaging the boss. On the 2nd phase of the fight when the friendly adds spawn you'll get 6 extra adds that need to be healed up and protected. Once all 6 have entered the tree you can kill the boss as normal.

Video guide to get this achievement: https://youtu.be/d4RmMUe3G1Q

Brief but full guide to all achievements here: https://youtu.be/68sqjf7ylI4

tl;dr of each:
Meaner Pastures There are 8 blue flowers around the room, burn them in phase 2 instead of the roots. https://youtu.be/iqMtfFfmoEQ

Cruelty Free There are 2 pots to the left, 1 pot to the right. Drop a spear on each of them (remember to break out your fellow raider). https://youtu.be/-yut5R9CYLQ

Swog Champion On the right out of the door, have someone climb over the rocks to find a spear. Click it. Star the fight. Click the extra action button. Don't kill the adds that spawn, instead get them near the tank and have the boss eat the adds (needs 40). https://youtu.be/LuYWOFTkslI

Don't Let the Doe Hit You On The Way Out Heal the doe on the right as you come in. Herd it to the boss room. Do the fight as normal, but use the flower to put out stacks on the doe until it has no stacks left (stay in that phase until this happens). Defeat boss, keep doe alive. https://youtu.be/dhRv_c-u7X8

Ducks In A Row On the left going into the room is Sergeant Quakers. Have everyone stand on him and get ducked. Click and /salute him until he helps (this may take multiple tries). https://youtu.be/pmoo3yAAOgw

A Dream Within a Dream Play flower keep away until intermission. Have 5 people around the room /sleep and click on a green butterfly. Defeat the moth that spawns, defeat the boss. May not work if you get a second intermission. https://youtu.be/dSSmM9ReXBI

Haven't We Done This Before? Open the path, then send 6 people to the start of the raid, have them stand in the pool. Have each person claim a rune and stand on it and click their extra action button. This disables the rune and does damage to the raid. Clear 6 runes and then defeat the boss. https://youtu.be/GPE-XthBjO8

Whelp, I'm Lost There are lost whelps hiding high in the trees between platforms. 6 people need to fly through 1 of them and then not die during the fight. Use this macro:
/tar Lost Whelp
/ping [@target] attack
https://youtu.be/47pyHxGVHuU

Memories of Teldrassil Send 6 people to find wisps in the raid (3 in the first room, 3 between council and Nymue). Click on the wisp, then do the fight. There are now 6 extra spirits to heal. Heal them :) (all 6 before you phase). Defeat boss. https://youtu.be/bEQh-WuuxKU