a couple of questions

Hi,

I have a lvl 18 Elementalist/Necromancer, but i want to change my 2nd profession to Mesmer. Is this a good profession for a nuker? Or should i take another 2nd profession?

Also, where is the best place to farm? And what build should i use?
I'd like to farm greens with a friend, whats a good nuker build for oro/fa farm?

Last question: At the moment i don't really know what i have to do to be a nuker... Can someone give some info? Like wich skills i have to use etc...

Thanks in advance

Uhm.. Can someone help me?