Probably my most important soloing guide.
Naxxramas is entirely soloable by hunter, some bosses have even been killed in 25-man.
It's also the most profitable raid. My best 13/16 (no KT, Razuvious and Maexxna) speed farming (read: bugging whenever possible) clean took me 1 hour and a half for 2200 gold. Beats killing 10 mobs for the three hundred twenty seventh time.
Most bosses have two methods: the legit one and the bugging, farming one. Both will be covered in this guide.
You will want five pets for farming, two turtle/beetles, two foxes, and one pure dps pet.
Trivial. Noth and heigan killable in 25-man too.
You can use a pure dps pet.
Legit method: dps the boss when he's on the ground, and the adds when he's on the balconny. He will sometimes blink, resetting his aggro.
Bug: you can FD when skeletons aggro you to despawn them.
Better use a fox.
Never get within 20 yards of him to avoid his plague. Keep your pet alive, and tank him on the platform.
During the floor phase, you can outheal the eruption damage. But during the safety dance, you better dance to be safe.
Tank and dps. You have a 3-second window to heal your pet every 20 seconds (your survival isn't in danger... and your pets not really). Spore give you a hell of a buff, so kill them while they're near you once in a while (explosive trap works wonders) to speed thinks up.
If you're going for the spore loser achievement, simply deactivate thunderstomp and put your pet on passive before sending him on Loatheb.
Spiders. Why couldn't it have been butterflies?
Use a turtle.
Legit Method: Best place to tank him is the entrance door, so your pet won't be bumped around. When he bumps you, disengage to avoid damage, if you need to.
Stay at maximum range for his locus swarm, and use pet CD redution. Misdirect the crypt guards and focus them down. Also kill the scarabs when they spawn.
Bug: If you're tanking Anub where I suggested, simply FD when the crypt guards aggro you to despawn them.
Really use a tanking pet.
Focus Faerlina while avoiding the fire zones. When she frenzies, kill an add. You can trap one add to reduce incoming damage. With sufficient gear, you can survive her enrage.
You will need 2/2 in improved mend pet.
She will launch her first cocoon 20 seconds into the fight, then every 40 seconds: feign death before she does.
Deal with the spiderlings with a multishot or explosive trap.
She will frenzy at 30%. Keep dps cooldowns for this phase.