Someone has already stated this before, but the FirstPersonMod is not compatible with this mod. If I'm not mistaken the reason is because with the FirstPersonMod renders the players body client side without the head so it doesn't obstruct the camera, but with the EpicFightMod the dev had to make a new model for the animations and because of that the FirstPersonMod doesn't make the models head invisible therefore it obstructs the camera. So a simple fix would be an option to disable the built-in first person of the EpicFightMod. I saw someone say along the lines of, "Well if the mod already has a built-in first person why use a alternate mod to get the same effect", and my reasoning is if you compare the built-in first person for the EpicFightMod to the FirstPersonMod, you will clearly see the FirstPersonMod looks better, no offense I'm just stating the logical truth. The camera position is better and you can see the weapons more as if you were truly in first-person. I'm not saying the EpicFightMod first-person is bad, I'm just saying we should have an option to disable it for other mods such as the FirstPersonMod, which was specifically designed for that reason. Plus all the animations still work with the FirstPersonMod the head just needs to be invisible.

It's only for a 1.16.4 version, but there's an option that you can turn off the modded animation when you're not in battle mode.