I would say skip the professions until after 60-61. Why? Well because you will have no time to do it since as mentioned leveling way to fast and honestly going to gather and herb or mine is a waste of XP time. During your 60-70 time you will have time to do some of it if you wish its a long road and it will take time might as well pick up a profession or 2.

I am now finally leveling tailoring on my non main, and I am doing that by using the stuff I gather from my second group send all cloth to group 1 and continue leveling, sure picking up loot will slow you some but still when you have to do some collection here or there what else are you going to do?

And yeah they are a big sink hole when it comes to training some of the time I cant even afford to train them, they go on leveling with lower level stuff until I can catch up