Aion Riftshade

Hello, I have a ranger, and I need to know what you recommend to equip with mana stones... critical hit +17/ma 7... I want to put that in the Army 2 set, is it recommended?  Or would you tell me what manastones to put?

How much critical damage, attack - magic acc -acurracy does a ranger have by default, without buffs? 

first gear: all ms ma+14/crit+8. After u can up all ms attack/crit. U need +- 950-1000 crit and ~2000+ ma