From what I have been reading a Mystic seems like what I am going to make. Are the races much different from each other? I was thinking of making a human for damage-is that a bad choice? Also, what class is a "nuker"? Thanks!
depending on who you ask a nuker is a long range high damage dealer
that could be an archer or a mage
human isnt a bad choice they are sorta the middle ground for offencive mages (necromancer is the current mage of choice)
light elf is meant to be the pvp mage but arent all that good at pve
dark elf is the pve mage but arnt too shabby at killing ppl either
Reverse order here...a Nuker is a class whose primary purpose is to blast an enemy with powerful spells. This includes Spellhowlers, Spellsingers, and Sorcerers, and some throw in Necromancers here. All of these branch off of Mystic -> Wizard.
Race is a matter of personal preference. Each race has different specialties...Elves cast quickly, but do a little lower damage, while Dark Elves cast slowly, but do a little more. Humans are between the two, and are slightly tougher but slower movement-wise. There are more specific differences, particularly once you hit 40...I suggest going to the Library section of this site and looking up the skills each of the nuker classes have to offer, and see what appeals to you more. What most people will tell you is to go Spellhowler for your first character, because Dark Elf nukers get access to spells that increase their up-time, and they do more damage per-nuke and thus have better mana efficiency and the ability to kill tougher mobs.
On the flip-side, Sorcerers and Spellsingers get good AoE spells, and a few other nifty things, but they suffer with higher downtime when they solo.
Don't go Orc if you want to be a nuker. Orc casters are melee/buffer hybrids, for the most part.