Exodia Force is fucking absurd and using this build has made me realise it is no wonder as to why they decided to not let [Condition Overload] affect the damage of Exodia Force

You do not need combo duration extension or Naramon. The reason this is better than [Nikana Prime] is because it functions extraordinarily well at even 0x combo modifier, let alone 12x. Yes, in Steel Path.

The empty slot there is a flex slot and, I shit you not, you can put literally anything you want there. I suggest quality of life mods that you enjoy using. Range mods do not affect the radius of Exodia Force, so don't let that skew your choice. More attack speed never hurts, except it does if you don't want to use an autoclicker for melee swings; enjoy R.S.I. otherwise. Personally I flip between [Condition Overload] and [Healing Return] and [Carnis Mandible] and I honestly can't tell the difference because things just die too fast to tell.