Why is it called Invincible if you can see it?

I apologize for the troll line in the header; I can't help appreciate the classic ones, even though I don't troll trade myself (see some of my favorites in Leveling Without Heirlooms).

We're a small group of people in my guild who would like some of the items that are obtainable from Lich King when someone acquired Shadowmourne. And some are interested in Shadowmourne too of course. So I thought I'd make an overview over how much time we would need, and we'll see if that's something we want to do.

Personally I really want the mount and the tabard. The locket, the music box and the frost dwarf transformation would be nice bonuses too.

Seeing that it will take 21 clears to get four Shadowmournes, I realise this might be a bit too heavy... Especially since we will probably want to bring more people than us 5. Here it is anyway. :)

Quests

1. The Sacred and the Corrupt
   Requirements:
   Light's Vengeance. Obtained out of raid; in Dragonblight at 74, 23.
   25 Primordial Saronite. 266 Justice Points each (6650 for all 25).
   Festergut's Acidic Blood from Festergut 25.
   Rotface's Acidic Blood from Rotface 25.
2. Shadow's Edge
   Rewards:
   Shadow's Edge 
3. A Feast of Souls
   Must have Shadow's Edge equipped to gather souls. Must do damage to the targets to gather their soul. Must be alive to gather souls. Can "tag" mobs/bosses with Shadow's Edge, and then switch to a better weapon.
4. Unholy Infusion
   Become the abomination. There will be a new button in the "vehicle"; Shadow Infusion. This ability can only be used once you have gathered 100 energy. Use the Shadow Infusion ability when the boss is around 40% health. Make sure to have the axe equipped when you are in the abomination.
5. Blood Infusion
   You need to be targeted by Blood Mirror (either tank or be the closest person to the tank). You need to be bitten, and you need to bite someone else 3 times.
6. Frost Infusion
   Stack the debuff to 4 before killing the boss. The debuff lasts for 2 minutes.
7. The Splintered Throne
   Requires 50 Shadowfrost Shard. Higher drop rate on heroic. It's not necessary to have Shadow's Edge equipped while on the quest, having it in your bags is enough.
8. Shadowmourne...
   Rewards Shadowmourne
9. The Lich King's Last Stand
   The person with Shadowmourne can loot Sealed Chest from the Lich King 25 when on this quest (only one time). The Sealed Chest starts the next quest:
10. Personal Property
    Rewards Unsealed Chest which contains
    
    • Alexandros' Soul Shard -> Mograine's Reunion -> Reins of the Crimson Deathcharger
    • Arthas' Training Sword -> Muradin's Lament -> Muradin's Favor 
    • Badge of the Silver Hand -> The Lightbringer's Redemption -> Tabard of the Lightbringer
    • Blood of Sylvanas -> Sylvanas' Vengeance -> Sylvanas' Music Box
    • Jaina's Locket -> Jaina's Locket -> Jaina's Locket

Time Spent

Week	Character 1	Character 2	Character 3	Character 4
1	Quest 1: Clear Festergut and Putricide. Quest 2. Quest 3: Try to get 50 souls without Putricide, Blood-Queen and Sindragosa. Quest 4: Putricide. Quest 5: Blood-Queen. Quest 6: Sindragosa. Quest 7: Lich King.
2	Quest 7	Quest 1-6
3	Quest 7		Quest 1-6
4	Quest 7			Quest 1-6
5	Quest 7
6	Quest 8, 9 and 10?	Quest 7
7		Quest 7
8		Quest 7
9		Quest 7
10		Quest 7
11		Quest 8, 9 and 10?	Quest 7
12			Quest 7
13			Quest 7
14			Quest 7
15			Quest 7
16			Quest 8, 9 and 10?	Quest 7
17				Quest 7
18				Quest 7
19				Quest 7
20				Quest 7
21				Quest 8, 9 and 10?