Managing Multi-Mob (Hunter / Druid)

[methods]

Hello. This is coming from an AOE mage; and the only problems I'm having are with multi-mob areas, which is also why I want to multi-box. I'm running a Hunter / Druid (2 pack)(Druid is Boomkin - because of the Hunter dead spot, I was not able to run say Bear Form or Warrior and Hunter) so I'm using the hunter's pet (Boar) as the 'tank' and hunter/druid at range. Overall this is working very well and I'm having a lot of fun with the comp! (2 Boxing comp, 1 hunter, 1 druid)

The challenge is that any multi-mob (4+), puts the hurt on the tank and when I heal, it draws aggro from EVERY mob, except tank target (then all hell breaks loose). I've tried using pre-heals on tank, roots / concussive shot / rotating pet damage to the different mobs, to not much luck. Curious if anyone has a strategy for this? (I was thinking about trying a pet with Screech when I can get that, currently level 22).

[Updates] Thanks for the replies. I have maxed pet health (endurance training) and Armor (thick hide). What's also cool about MB is that you can run talents that are not 'optimal' for solo leveling. I'm looking forward to . I need to get over to Westfall to learn screech and then later dive. BTW.. I love charge on the boar.... not sure why he doesn't get more love; I like him better than the cats.

I've just ran the raptors (screechers) in the wetlands , (4+) raptor mobs where one guy calls his buddies. I had a little more luck here, with some planning. Mobs 1-2 levels lower is best
1. All buff up, thorns etc.
2. Frost Trap (but I think Dots are breaking these early, so no dots)
2. Hibernate one of the mobs (so only works with beasts)
3. root the other
4. pre-heal, attack, max damage, kill 1-2 quick or just re hibernate (hibernate is cool because you can cast it facing any direction)
5. Profit

The DPS difference between the Druid and hunter is rather large; hunter wins by a long shot atm.

Thanks!