I did engineering on all four first and then jewel crafting.

Engineering was 10-12k and jewel crafting was.. well just a lot more expensive -- around 25k for both professions on all 4.

I use the rockets with my elemental mastery / lava burst macro -- they're helpful since every team I face just pillar humps so it comes down to my druid rooting one and then I blow EM/Lava/Rockets on that one target, move to the corpse and camp it for 3 minutes until we can do it again.