Author’s note
-Never post this to other sites or forums without my permission, do not plagiarize the guide or else you will be punished by the law.
-I didn’t created this guide to prove that i’m a Pro Mari user, but to prove that what extent of power and skills Mari can do to you.

(INCOMPLETE)

Tip that pretty much EVERY Mari gunslingers know:
Using Wing Drive Weapon and Mana Shield is pretty much the only thing you need for Dungeons. Attacking with this while Jumping and Dropping off a platform with enemies on it does massive damage that fills up your mp bar. The damage is so big that you dont even use your MP for ANY of her skills because that’ll just be a waste of shield and time on the W.D.W.
It’s so strong that You can end the Cyclops or Victor on 3 stars really quick. (I think it took around 10 seconds for victor’s first form to die and about 15~20 to kill the cyclops since there wasn’t any platform to spam on in the middle of the room)
i’m pretty sure you’d know this already but (in case you forget o~0) you should add this combination in your Guide cause it’s pretty useful and dangerous in dungeons. I’m not sure if it’s good in pvp however o-0