Since staff is also a melee weapon (rf online gold) warriors accuracy buff, which add accuracy even though you are using buff, and warrior's crit buff is also useful making your damage like hell high accuracy mid.
CRIT: making your enemy stun and can not use HP potion high def low dodge high HP rangeXmage inRF: hecate + Vulcan (upgraded with chaos talic) ranger has higher CRIT rate than templar, while ranger has the lowest accury (refering to adventurer) when using bow high dodge low accuracy (since your cora you have magic accuracy buff) low def high crit high SP, it is base on your experience of encountering coras ranger they have high crit. They kill your shielder flawlesly eventhough IM using +5 set armor.
A staff is not considered as a melee weapon, not unless you dive into the enemy, then you could hit him with a normal attack. No snipe does not offer crit to force. Counter attack is not good when you are a mystic. When countering, you will only do a normal attack with your staff.
Pros: You have the melee orrange elite and you can cast debuffs. Cons: You do not have any class skill. When you hit level 40+ (rf gold) and your summon died, it will take you a long time to resummon it again, especially since you do not have the class skill of a level40 faust or summoner, and your summon is not as strong as a pure Faust.