Bah i wrote a long reply and the forums ate it. My (much abbreviated this time) thoughts on having done these fights in ICC10/ICC25 on my shaman

Marrowgar - easy even with low dps this should be a farm boss as I have managed to heal this for 9mins when i was in a fail pug. Just need to stay alive during bone storm

Lady Deathwhisper is actually harder than it looks ive had lots of pugs fail on her as there are a lot of things to take into consideration. At low gear levels its hard to heal through with 2 healers and you need to decurse too. With 3 healers its very hard to beat the enrage timer.

Gunship is the easiest fight solo but I still think it will be hard to box as your group will be split (some on cannons some on each ship) it will also be hard for boxers that have not switched to software that allows accurate mouse broadcasting

Saufang has low dps requirements as long as you can avoid healing the boss too much. Hopefully this should be easy through focus firing blood beasts 1 at a time though with no hunters (dont think anyone is boxing hunters now?) then kiting the blood beasts will be tough so the fights will take longer which makes the encounter far far more difficult. Marks are also tough to heal through as well.