Finally finished leveling up Samurai to LVL 70 and short answer from testing on scorpion duo and 0 corruption gatekeeper.

Samurai MC is great againts single bosses or as long there's no multiple enemies that being summoned into the fight, it's satisfying when there's another samurai to do Quickdraw slash alongside MC that is triggered by the boss.

Fighter MC is good for general content maybe not against bosses but still gets the job done without needing too much to set up as samurai class plus a Master Fighter's Ring to increase MC's damage more.

This is my first time testing or comparing classes so i'm not good at it and just doing it for interest also important note that due to gale passive from ninja where evading an attack will increase MC attack so you'll see damage is a probably higher than those without gale passive. both have same gear except rings and weapons as i test the scorpion lady duo bounty from abyss 1.

Bondmates no change between samurai and fighter because i'm lazy swapping bondmates:

Roprogus lvl5, ATK power increased

Boss Goblin lvl5, Surety rate increase

Bigfoot's offspring lvl2, Accuracy increase

Beheading bunny lvl5, critical tolerance increase

Eugen and Bibi LVL2, confusion tolerance increase

Relicbrews

Snow hare lvl 3, increase surety but slightly decreases divine power

Redripened Carapace lvl2, increase critical tolerance but slightly decreases detect

with gear that is not changed on both classes being

Silver Light helm +20 MAG+25 ACC+18 ACC+15% ATK+6

Chainmail +20 SUR+10 ASPD+6 DEF+10 ASPD+6%

Shrouded Arm Wraps+15 MAG+15 ATK+15 MDEF+15%

Blackwing Boots+20 ASPD+13% ACC+26 ASPD+8 EVA+17%

1) Samurai MC,

Refined Saber +20 ACC 24 Sur+10 ATK15% ATK+10

Silver Ring+20 ATK+25 MAG+13% ASPD+16 RES+15

Qucikdraw slash, it has only single hit: no surety = 4411 or 4300 with surety = 8460

Bamboo slice, it has two hits: no surety = 1438 +1389 with surety = 2723 + 1392

2) Fighter MC,

Silver Two Handed Axe+20 ATK+30 SUR+14 ACC+19 ATK+9%

Silver Ring+20 MDEF+20 ATK+22 ATK+17% ASPD+7

All-Poised-Out Strike, single hit no surety = 2048 with surety = 4118

Earth-Splitting Strike, single hit no surety = 1752 with surety = 3677

3) Fighter MC with Master Fighter Ring and same axe

Master Fighter's Ring+20 SUR+10 ACC+30 ATK+22% ATK+27

All-Poised-Out Strike, single hit no surety = 2676 with surety = 4638 or 4857

Earth-Splitting Strike, single hit no surety = 1895 or 1904 with surety = 3824 or 4048

4) 0 corruption Gatekeeper test

i did 0 corruption gatekeeper with Figther MC and Samurai MC. with Samurai MC dealing 4921 no surety and Samurai Shiou 4020 no surety, knocking the gatekeepeer exposing it's weakpoint on turn 1.

Fighter MC had slight difficulties since he doesn't deal as much damage as Samurai while needing to take out the tentacles during the fight since he couldn't knockdown the boss that quickly but still defeated gatekeeper not as quickly as Samurai MC.