I came to p99 from Fippy on live, and I can safely say nothing is a better duo with a Shaman than a monk. My buddy and I were stupidly dominant, offering the best of everything. Buffs, debuffs, heals, pet, amazing dps, and amazing pulling. The SK is a good option as well, but it breaks down to:

SK does less damage, his FD is not as reliable as a monks, and adds a pretty heavy xp penalty to your setup.

The monk tends to be safer, kill faster (faster killing speeds means more xp per hour, less healing required) and until the post-Velious Monk nerf can tank as well if not better in circumstances than a SK.

Monk if you are a min/maxing all-about-efficiency type, SK if it's not a big deal and your buddy prefers that class. You definetly want a melee over a caster, make that haste buff work for you!

I currently duo Crypt and other high end camps with a shaman. All we do is slow, pet tanks and torpor/dot. Some kills can take a while if they are healers since we have minimal ways to stop it . The upside is we never run out of mana so downtime is based on the player needing to go to the bathroom etc.

monk will never have the tanking ability of SK. While its all good when fighting regular mobs, it is a different story when pulling high lvl named. SK is better for end game duo with shammy.

tanking ability > dps

If it can be slowed then it can probably be killed solo by the shaman. A monk just helps you get there faster.

If it can't be slowed than an SK won't do much good with a shaman healer.

This is simply not true. Slow is nice and helps a lot, but its not everything, especialy when engaging named mobs. Thinking shaman can solo stuff he can slow is just silly. In most cases, shamans cant take damage from high end named dungeon mobs. Also, shaman is not cleric... HoT is cool, but on long named fights shaman will be in pain healing monk.

These guys want to take on named mobs in dungeons, SK is the best option, end of story. More hp, better aggro management, much better tanking abilities.

It does not matter his dmg is lower then monks, what matters is whether he can TANK the mob long enough to kill it. He can certainly do that better then monk.

List a name that a sk can tank and a shm can't imo. Shm > sks np.

There is also data parses out there suggesting monk avoidance is on par or better than tank mitigation for damage taken.

This + I doubt a shaman and SK will be able to duo many mobs that the shaman couldn't solo.

A Ogre Shaman that can slow the mob is a hell of a tank and can kill solo pretty much everything high end but raid mobs, even if it summons. No SK is going to do that solo. Slow is one of the best spells in this game for toe to toe killing.

reading comprehension ftw