I'm lv 25 nearly 26 ranger now, so far i'm really enjoying the class, some pointers though.....
Trick Shot is very hard to co-ordinate with the MT most of the time I found that the nukers just couldn't hold the trigger long enough and was getting aggrod, so I decided it was much better to use mid-way into a tough fight and hope the MT has build up enough hate if something goes wrong.
I've grouped with an assassin and worked out that both classes are pretty much balanced, the assassin does indeed do much damage in a single blow but is far outmatched by the ranger in other areas, especially pulling. So far, the ranger isthe ultimate pulling class, not only can the ranger pull mobs safely and at a very long distance, can with practice and some co-ordination transfer a large amount of hate onto the MT, for instance, start the pull with sniping shot, once the mobs in range follow up with trick shot and wait for the MTs first attack, then follow up with some debuffers then jump into hand-to-hand. I always save backshot for when the mobs close to death.