Alliance LBRS for the time-challenged:
I haven't five-manned LBRS yet, but I've raided it enough to have at least a reasonable idea of how long it would take to do these groupings. If anyone's got a better read on timing, let me know.
The following quest requires collecting Spire Spider eggs, and it requires fifteen of them. You'll probably need to collect a few each time you pass through the Spider area, so this is not a "complete all at once" quest.
En-Ay-Es-Tee-Why
Your first run through should take care of the following quests. You'll bypass Omokk, most of the trolls, and you won't go any further than the spiders (affording the opportunity to collect eggs). I'm guessing this would be under a 90-minute run. Recommendation: get a Warlock buddy and a couple of other folks to park at Flame Crest, then hearth out after acquiring Mother's Milk. Join their group after hearthing and get summoned to Flame Crest to turn the quest in. Any other method of trying to get that quest done is probably going to be frustrating.
Bijou's Belongings (acquire and collect item)
Hot Fiery Death/Unfired Plate Gauntlets (Blacksmith only)
Mother's Milk
Having acquired Bijou's stuff, you now need to talk to her again. Unfortunately, you still don't have the quest to kill the boss mobs; fortunately, that means you can still skip Omokk, and you won't even get past the trolls this run. Since you can get out of Dodge after taking down Vosh'gajin, this one's actually a pretty quick dash; it should probably only take about an hour.
Bijou's Belongings (turn in)
Message to Maxwell (accept)
The Final Tablets (Vosh'gajin)
Snakestone of the Shadow Huntress (Vosh'gajin, Blacksmith only)
After this, you'll need to head to Morgan's Vigil and have a chat with Maxwell, after which you'll have the big daddy quest of the instance. You'll still probably want to divide it up, and take advantage of the ability to skip half the instance on the following run. This segment is probably around 90 minutes. Make sure you grab a roughshod pike on this trip, even though you're not using it yet; you won't be passing by the rack next time. And be sure to loot Omokk's head as well.
Maxwell's Mission (Omokk)
Maxwell's Mission (Voone)
The Final Tablets (Voone)
Here's where you get to save a bundle of time. After the second large pull of the instance, you're able to jump off a ledge which takes you straight to the Orc gauntlet -- allowing you to skip the entire upper floor leading to Omokk, as well as the entire Troll stronghold. In a 5-man group, this is saving you up to 90 minutes of unnecessary clearing. Plow through the Orcs and Spiders (grabbing eggs if you need them), hit the Ogre event, then Halycon, and finally the Overlord. This is probably a two-hour run.
Urok Doomhowl
Put Her Down (Halycon)
Kibler's Exotic Pets
Maxwell's Mission (Wyrmthalak)
And having taken care of that, you've cleared the five-man quests from LBRS. Anything else you need to do here, including acquiring any gems for the UBRS key which you haven't already run across, can be done in raid. I'm not sure if you need to go into 5-man configuration to turn in the key quest at its conclusion, but if so, that's not even difficult, as you only have to get through 21 mobs to get to the quest mob.
I haven't five-manned LBRS yet, but I've raided it enough to have at least a reasonable idea of how long it would take to do these groupings. If anyone's got a better read on timing, let me know.
The following quest requires collecting Spire Spider eggs, and it requires fifteen of them. You'll probably need to collect a few each time you pass through the Spider area, so this is not a "complete all at once" quest.
En-Ay-Es-Tee-Why
Your first run through should take care of the following quests. You'll bypass Omokk, most of the trolls, and you won't go any further than the spiders (affording the opportunity to collect eggs). I'm guessing this would be under a 90-minute run. Recommendation: get a Warlock buddy and a couple of other folks to park at Flame Crest, then hearth out after acquiring Mother's Milk. Join their group after hearthing and get summoned to Flame Crest to turn the quest in. Any other method of trying to get that quest done is probably going to be frustrating.
Bijou's Belongings (acquire and collect item)
Hot Fiery Death/Unfired Plate Gauntlets (Blacksmith only)
Mother's Milk
Having acquired Bijou's stuff, you now need to talk to her again. Unfortunately, you still don't have the quest to kill the boss mobs; fortunately, that means you can still skip Omokk, and you won't even get past the trolls this run. Since you can get out of Dodge after taking down Vosh'gajin, this one's actually a pretty quick dash; it should probably only take about an hour.
Bijou's Belongings (turn in)
Message to Maxwell (accept)
The Final Tablets (Vosh'gajin)
Snakestone of the Shadow Huntress (Vosh'gajin, Blacksmith only)
After this, you'll need to head to Morgan's Vigil and have a chat with Maxwell, after which you'll have the big daddy quest of the instance. You'll still probably want to divide it up, and take advantage of the ability to skip half the instance on the following run. This segment is probably around 90 minutes. Make sure you grab a roughshod pike on this trip, even though you're not using it yet; you won't be passing by the rack next time. And be sure to loot Omokk's head as well.
Maxwell's Mission (Omokk)
Maxwell's Mission (Voone)
The Final Tablets (Voone)
Here's where you get to save a bundle of time. After the second large pull of the instance, you're able to jump off a ledge which takes you straight to the Orc gauntlet -- allowing you to skip the entire upper floor leading to Omokk, as well as the entire Troll stronghold. In a 5-man group, this is saving you up to 90 minutes of unnecessary clearing. Plow through the Orcs and Spiders (grabbing eggs if you need them), hit the Ogre event, then Halycon, and finally the Overlord. This is probably a two-hour run.
Urok Doomhowl
Put Her Down (Halycon)
Kibler's Exotic Pets
Maxwell's Mission (Wyrmthalak)
And having taken care of that, you've cleared the five-man quests from LBRS. Anything else you need to do here, including acquiring any gems for the UBRS key which you haven't already run across, can be done in raid. I'm not sure if you need to go into 5-man configuration to turn in the key quest at its conclusion, but if so, that's not even difficult, as you only have to get through 21 mobs to get to the quest mob.
Darian Redwin - just some dude now