I found tanking on my PAL got tons easier from 42-50. As mentioned, Circle of Scorn is a great way to add aggro to the group at the beginning of a fight when paired with flash, and spirits within is a nice heavy attack. I also recommend going for the relic weapon ASAP. Jumping from an iL 45-50 weapon to an 80 or even 90 makes a huge difference in hate generation, even when level synced to lower dungeons. You are almost at the level to unlock your beast tribe missions where you can gain XP and up to 30 Mythology a day. This helps get a head start on the 900 you will need to upgrade your Relic weapon from 80 to 90. The relic quest itself isn't too bad, and as RhazeCain said, the duties you have to run will Queue with two tanks, and you only need one. Chances are you will get another tank who will already be geared and can MT, you just try not to die.

Good Luck

Chiisai