Just punch him hard, if that isn't enough, punch him harder and believe in your bond with your servants.
Example:
AMAKUSA I'M DYING WHAT DO I DO
PUNCH HARDER ACHILLES JUST PUNCH HARDER
GUTS AND NO PAIN AND PUNCH HARDER
HELLENIKA DAMASHII!
YOU STILL HAVE MANA LEFT IN YOUR MUSCLES
HELLENIKA DAMASHII!
PUNCH HARDER BOY
YES MASTER I HAVENT USED EVERYTHING I'VE LEARNED YET
ACHILLES WINS LOL
>YOU GOTTA PUNCH HARDER BOY!
>ACTIVATE THE MANA IN YOUR MUSCLES!
>CALL FORTH YOUR HELLENIKA DAMASHII! GODS BLESSINGS!
cue Achiles brand new 720° 4th dimensional NP that warps time so his punches land before they're even used
punch harder
Mana muscles
hellenika damashii
remember troya
inherited gods blessings
Achiles fight copypasta:
>Achilles: Amakusa, I get the living shit beaten out of me!
>Amakusa: Holy Fuck! I didn't it would come to this! You gotta PUNCH HARDER, mah boy! Guts and PUNCH HARDER!
>Achilles: Ok Amakusa, Ima gonna NP huehuarder and block some more punches with my head! Here we go! Holy fuck! i got plenty of Mana in my muscles! Amakusa, you're the best Master ever!
>Chiron: Oh shit! He's got plenty of Mana in his muscles ! FFFFFFFFFFFFFFFFFFUUUUUUUUUUUUUUUUUU.
He regains his senses and manages to PUNCH HARDER and STICK TO THE BASICS
>Achilles gets punched around
>Achilles helpless
>Amakusa being the useless piece of shit he always is
>Achiles is about to hit the plane
NO! I HAVEN'T USED EVERYTHING I LEARNED YET! MUH TRAINING WITH CHIRON! HURRRRRR
>gets up
I STILL HAVE MANA LEFT IN MY MUSCLES
HELLENIKA DAMASHII!
GODS BLESSINGS!
720° 4TH DIMENSIONAL NP
>be a useless piece of shit and get beaten up for 10 rounds until one eye swells up
>Amakusa what do i do
>PUNCH HARDER BOY
>ok, Amakusa *punchs harder*
>OH FUCK ONE MOLECULE OF HIS HAND GRAZED MY CHEST! BUT THE FORCE OF THAT WAS STRONGER THAN THE 10 ROUNDS WORTH OF BEATING I'VE GIVEN HIM, ALL AT ONCE!"
>Chiron knocked out
>congrats Achilles! you're truly a world class servant!"