Grand Widow Faerlina – Rather than killing her adds to dispel her enrage, you need to MC a Naxxramas Worshiper.
>>>Umm just kill the two that are not like the others and have a OT pick up the rest…2 heals on OT and 3 on the MT and the enrage is a joke. Doing it that way is both easier and gets you the achievement.

The Slime Room (Construct Wing) – Not such a big deal with 10. Will completely wipe the raid on 25. Ow.
>>> Umm how? Drop a frost trap if you want…or suicide a pet into the middle to get them all to group then AOE…or don’t bother and just kill them all as they come out…all you need is a tank that can keep aggro while doing a small amount of kiting. Either way EZ sauce.

Patchwerk – Ok, this guy is still a healer aneurism waiting to happen, but instead of one hateful strike tank you need two. And he can use hateful strike in *very* rapid succession. Think – every 2 seconds.
>>>The poorest geared tank MTs and the 2 best (i dont really care about class) eat the bolts. @ heals per tank with your 2 weakest on the MT (or just 1 strong one)

Gluth – 4-5 kiters is better than 2, you can give them their own healers,
>>>1 kiter (we use a DK for speed buff), 1 healer and a mage or a hunter for CC. Even with Chow going normal speed… a DK can easily outpace them. If a Chow gets loose, the mage/hunter hits him, and the DK picks him up. As long as you get some frost action CC it is nearly as simple as 10 man.

Instructor Razuvius – you need two priests (preferably with >300 hit rating) to MC two of the Deathknight Understudies, as well as a tank to keep hold of the OTHER two Understudies (yes, there are four now).
>>>We agonized over this fight pre-raid since our priests were holy and had no hit rating gear to speak of. They threw on some dps gear that they regemmed for hit and only had about 150HR. The understudies broke only 1 time and he was the one the Instructor was beating on so we just killed him, the priest grabbed another and the OT had one less mob to worry about. Maybe the easiest fight of Naxx.

Four Horsemen – We ended up with two offtanks in the back (fury warrior in tank gear and a bear), and TWO healers for each tank – a main spec healer and a hybrid in healing gear.
>>>2 healers per back tank? wow…as long as the tanks are the closest to the boss, they are the only ones taking damage. Throw a prayer of shadow prot on the raid and have a tank (we used 2 dks in whatever tank gear they had I believe) and a healer on each of the back bosses. I don’t think our healers ( we used a priest and druid)went below 75% mana back there.

Not in any way throwing around epeens…but 25 man is much easier, much more forgiving then 10 man.

Gunsnbutter Excelsior/Uther