So when i play sage battlefield today i use this line up :

X X X
X Mifune Earth
Mabui KK Gaara X

Then i put all my high refining equip and initiative rune to Mifune. but he still slow, my opponent who have lower BP than me can cast skill faster. (im pretty sure that i have highest initiative than them). im really confused. then i trade all mifune equip on my MC so my MC has the highest initiative now. than i challange the opponent same as before. and my MC cast skill faster then them now. So my question is, did initiative dont effect ninja beside MC? how can i make Mifune skill faster as he is the damage dealer in my team?