Mechagon

may I suggest to display the waypoint as this so it can make a route easier to follow :
/way Mechagon Island 72.1 72.9 Unit 17
/way Mechagon Island 64.7 64.6 Gnomefeaster
/way Mechagon Island 65.4 57.7 CK-9
/way Mechagon Island 60.6 56.9 Goldenbot XD
/way Mechagon Island 59.2 50.9 Creakclank
/way Mechagon Island 60.7 46.5 Sputtertube
/way Mechagon Island 51.1 45.4 Unit 35
/way Mechagon Island 39.5 40.1 Unit 6

In https://us.forums.blizzard.com/en/wow/t/new-to-pet-battles/214678/2 Manyatko said:

"The daily legendary quests on Mechagon and Nazjatar can be done with a Voodoo Figurine, Infected Squirrel, and a 3rd undead pet that has abilities that’re strong against the legendary you’d be facing."

This immediately hit me in the rose-tinteds, because this was a combo I loved back in Mists.

There are a couple of variations.

Sen'jin Fetish can usually replace the Voodoo Figurine, and I prefer it in this combo, because it has more Health and more Power, and as an Undead against Legendaries, the Figurine's slightly higher Speed doesn't usually help. I will therefore refer to the Fetish hereafter.
Infected Squirrel is usually the better of the two undead squirrels for this, because of Corpse Explosion, but Blighted Squirrel with Woodchipper and Stampede is the winner when its Crouch is needed to guarantee surviving long enough. My preferred breed for both is H/P.

The general method is this:

Sen'jin Fetish:

1. Flame Breath until you have one round left to live. This is not always easy to predict, but ideally, you want to keep repeating Flame Breath until you can get off just one Wild Magic before you are brought to zero. The sequence will obviously depend on the damage the target does. If you're really stuck, just keep alternating Flame Breath and Wild Magic.
2. On your Undead round, use Rot. This makes the target take damage as Undead for 5 rounds.

Infected Squirrel:

1. Apply Creeping Fungus
2. Stampede until your Undead round, or if you will live only one more round before becoming Undead, and Stampede is over, Corpse Explosion. The idea is to stack Corpse Explosion as your last act, and/or to leave the target with two rounds of Shattered Defenses.

So I just went around Naz and Mech and knocked down 7 of them with this combo. It's great to use it again! I haven't had to use my third pet yet. Probably something will require the third pet.

This general method doesn't constitute a detailed strat, but I commend it as an interesting base to anyone who is looking for alternatives.

/way 64.8 64.6 Gnomefeaster
/way 60.7 56.9 Goldenbot XD
/way 65.4 57.6 CK-9 Micro-Oppression Unit
/way 39.5 40.2 Unit 6
/way 60.7 46.5 Sputtertube
/way 59.2 50.9 Creakclank
/way 51.1 45.4 Unit 35
/way 72.4 72.4 Unit 17