im sorta new to the game. played it back at beta for a bit... anyway

im back and im running a necro mesmer atm, and i was wondering if there was anything i should run in PVE cept for the MM build (which was nerfed anyway i think)
i have been thinking about making a build to punish melees any way i can, maybe with 1 or 2 interupts to get rid of casters... but i dont know really :P
im still low lvl.. lvl 7 in the part just after ascalon got smashed. seems i can buy skills, alot of them, at the skill trainer in that town, but im not sure if its worth it.
plz can anyone think of a build, or give me some general ideas about what dirrection to go ?
.. small question aside.. the necro has skills that do "25% chance of missing, when miss gets X dmg" something like that.. i was wondering of those kind of skills stack with eachother to make it hurt more, or miss even more.