This guide is just from my own personal experience as a Sniper, with the help of all the info I’ve read here in forums, in the English & JP Wiki, and from friends in game. Corrections and opinions are welcome, as I need more help in completing this simple guide. :3
I can proudly say that a well-equipped Snipers are the best DPS class in game. DPS as in damage per second, as a level 180+ or 200+ can deal 20-40k+ damage per second, and at lvl 260+, you can deal up to 150k+ damage per second, depending on the mobs/boss, your build and equips, and the party you are with. But Snipers tend to fall on one of the hardest class to level up, low survivality, no heal (unless you own a Veltria xtal), no mp heal, the hunter class discrimination, and so on. So patience and hard work is a must :3