I call out the composition of each wave as it comes, more so that I can make sure the right number get shackled and sheeped, but it also gives the tanks a heads up. We typically run with three warriors, myself, and another bear. On waves without Aboms, we pretty much just pick a few and it self-organizes. We shackle all but three Aboms, and the three tanks who aren't me pick up the ones who don't get shackled. The other bear usually grabs the rightmost, one warrior gets leftmost, and the other warrior gets whatever is left. Sometimes there's a moment of confusion, but it gets sorted out quickly. Once they get a hit or two on the Abom, they're usually looking for any loose mobs that I haven't grabbed. The left-right thing was something they sorted out themselves, but it's worked wonders for us.

I usually end up with 3-5 mobs, which as people above have posted, I just rotate through, making sure I land a mangle or a maul before switching targets, and swiping every GCD that's not a mangle. Staying away from other mobs helps a lot, especially if you use nameplates, as it makes it much easier to establish a rotation. Once you get them all mixed up with the other tanks, it's a lot harder, but debuffs are a good way to track them.

Another thing I can't emphasize enough is using a hybrid set of tank and dps gear. Nothing hits so hard that you need full tank gear, but if you're going to be holding more than one Abom, you'll want something more than just dps, since those stuns can be brutal. A [Bloodlust Brooch] that you can pop for some extra dmg on Swipe early on, combined with a defensive on use for when you get an extra Abom. I stack a bit of hit as well, [Band of the Abyssal Lord] and [Frayed Tether of the Drowned].

This is very similar to how we do it. We don't use a paladin tank. We use 1 or 2 ferals, 1 to 3 prot warriors...depends who is online and a DPS warrior. All of the tanks other than the main tank wear some DPS, these mobs are level 70 or 71, not 73 like a boss, so you don't need full on defensive gear. Heck as enhance shaman, I sometimes out-aggro and simply end up tanking necros, banshees(they're not as easy as a necro) or a felhunter.

It should become pretty clear what each tank is best at tanking for each wave so there's not much vent-clutter of who gets what. Others have given hints, but since I'm a necro killer, i don't really know who's tanking what.

The dps warrior then taunts a single mob, the ranged kill that one.
Depending on the wave, we have rules like, this wave ranged has to single kill 3 mobs before AOE, that wave may only be single target 2 or single target 4. So sometimes the tanks have upwards of 30seconds before AOE starts to get aggro. This number of single target kills is what works for our guild, your guild will have to figure out if this strategy can work for you or not and just how many should be single target killed per wave.

Secondly when a mob does break free, don't let your paladins be a bunch of wimps... they can take several hits in full healing gear... have them taunt that mob at range and walk it back to the tanks. Ours have gotten lazy at this as we laugh at the DPS'r who pulled aggro, but while learning make sure they're helping out ... a bear who loses a mob and then has to charge it and get back to his other 3 or 4 mobs is highly likely about to lose some more of them. Your paladins are standing around in 10k-ish armor.. have them bring those mobs back to you. Heck have him standing near you the entire time, ours do.

For the necros.. they're painfully easy... in the pre-azgalor packs our main tank warrior uses spell reflect and just keeps using it while building threat on other mobs. The melee go and just randomly kill whatever necro they like. The ranged sometimes help kill one or two necros depending on which wave it is.

Finally the azgalor wave 6, i believe that's the one, it has way too many necros and banshees. A shaman runs way down the path and just starts dropping totems as he runs back. This kind of splits up the caster mobs a little so they don't slaughter the NPCs or your tank.

I know the original poster only asked how his bear could do better threat management, but I think perhaps his raid might want to re-think about what they could be doing during the time tanks are building aggro.

Good luck in Hyjal.

I have had the same issues that people are describing in Hyjal, it can be very difficult to hold aggro on several mobs, especially when Swipe is not an option (we use CC on some waves). Globally my role as a bear is not to hold aggro on the maximum number of mobs (we have 2 prot warriors and sometimes a pally for that), it is to pick at least one tough target (typically abo), some smaller targets if possible, taunt mobs off NPCs and pick up mobs that aggro our aoe guys.

A few things that helped:
- use main targets (ora2/CTraid) and pick your target early, you can a yellow-ish frame around your target so you know if somebody else has picked it too, it's useful for early distribution
- have MT/assist bind marks to F1 -> F7 or so and quickly mark targets
- have a set of focus macro so that you can easily find your current target, previous target and focus target, it can help a lot because most of the time I "lose" my targets in the chaos. If there's a way to quickly pick whichever mobs have aggro on me that would be useful as well.

Its not 10/14 seconds either. Its 0.85*10/14. You can't simply throw in that value * 65 * the corresponding AEP for Agi since that AEP assumes EVERYTHING benefits from Agi (including the mangles and rips).