I am a new Bourgeois, using Gun build with dex and con.
I need some help with some skills i am not sure about, I will write them with my question for each, and hopefully anyone could help me out

Summon Dread Knight : well, the 2x hunters seems like great DPS, is this guy good for bosses or anything? why should i lvl up it?
Sniping - most of the gun bourg skills requires sniping lvl 9.. i guess its a mmust but what u think? and if i lvl it up, will it be usefull at lvl 100+ too?
Zullie Storm, Zullie Bolt, Zullie Stun, Toxic Shot - I have no idea about any of them.. need help about uses for each, levels, and if i should skip any.
Reflect Aura - seems kinda useless to me, but i might be wrong.. what you guys think?
the rest is easy to handle..
I do need some help about what skills i should lvl up first and what should i focus more... i got like 15 SP left after lvling my dodge and atk power buffs..
- what will be my main atk skills?
- is the aoe usefull (Zullie Storm)?
- what should i leave for later levels and what should i rush for now at the begining of lvl 100?
- about the Merchendizing, how importent is it if im not crafting yet? lvl it up later? or now?
Yeah i know its alot of mess and questions.. but this is my first character here, and i do wanna make it good as much as possible, need someone who can make some order in my head, and seems the people in the game are too busy to help most of the time

Thank you!