Armasite or Finstern the dark dragon?

Hello. I just add second slot for my staff. The first slot I use shampy. So which xtal is better for second slot? Armasite, Finstern or other?

 

Getting Mp 2000 is always the first priority, so finstern if you cannot get 2k with current gear
If you use finale only, Neo can be your third choice if you don't get low aggro but with 2k mp already. M pierce is less important to finale compare with to burst.

Personally suggest you replace shampy with something else, but well it does cost more...

 

Id say neo and finstern

 

Why? 20% magic phiece is weak than 2% matk? With food and mp buff I reach 2000mp already.

 

With buff and food 2000mp can achieve. Finstern have 7%matk Armasite 5%. So Finstern have 2%matk more than Armasite. But Armasite have 20% magic phiece.
Finstern is really good for newbie and damage tester. Because they fight low level boss or boss have low mdef.
Magic phiece is not effect in finale? Even with ornlarf normal have 750mdef. And 20% of 750 is 150. And with 2%matk we can gain 2% of base matk. And base matk is calculated by int, dex, weapon atk and refine, current lv. Current normal player can have 5-6k matk(it isnt base matk. It is matk after bonus from equipment, food, avatar). So lets assume base matk is 4k. 2% of 4000 is 80?
I believe that recent released boss didnt have mdef below 500 at normal difficulty. And hard nightmare ulti have x2 x4 x6 mdef of normal.