100% critical strike stab??

I saw my friends using halberd and it seems so op so i made a halberd too but i don't know how much points to give on critical to get 100% critical rate on strike stab since i dont have punish ray. Here's my equipments
Ice spear A7 C121212
Heavy knife as sub weapon
Armor S7C121212
Gothic hat with warmonger
Muscle ring 3 with bexiz
Critical up and critical spear 10
HELP!!

 

thats good. get 67crit stat... i dunno bout computations but we almost have same equips and i have 67crit stat. based on my observation its like 90~95% crit already. i can spam strike stab all crit. i rarely see white dmg. If I get non crit dmg must be my unlucky round but that doesnt guarantee them the ranks i have 1730mp without buff.

 

Ohh i see then 67 crt it is, thank you very much

 

How many critical rate up when critical speare 10lv.?

 

+5crt