Need help with minecraft damage limiter

Let me explain what I am doing first. As a side hobby when I am not writing I have been putting together a mock game to Monster Hunter on my PC for Minecraft. I have been doing this for both of my daughters and for my own enjoyment during that time when I am not doing other things. I use several mods that will create an increasingly difficult format as it progresses. I have created mods for myself and for my daughters to use in conjunction with the mods that I have found online. In creating the increase in difficulty I have found that the weapon attacks are limited to around 1100 damage, though criticals will hit up near 2400. The progress of the game I am setting up will have monsters and beasts with very high hp and attacks.

Right now, It appears that the weapons will not strike with anything higher than 1100 damage and the armor is not deflecting what they are supposed to as I look at the mechanics of the armor. Now, what I am hoping to have answered is if there is a way to break this limit.I will give you an example of what I am doing. Mission Level 10 hunt: Likanth; 1,900,854 HP, Attack 45,000, defense; Knockback 20%, Arrow -45%, Melee 35%, Explosion -65%, regeneration 5,000, Combat regeneration 3,600. Even with all of the heart containers that the player will have accumilated by this time, a fight with this kind of a beast would not be possible with the current limits. I would like to continue setting this up for my daughters. So far they have fought through half of the Mission 1 levels over this weekend and they are hoping to do
more this weekend coming. By then, I am hope to be able to continue on the same path I have been on.

This was a response I had to another forums response:

I have weapons that were created that have from 9 and upwards to a million damage. That is the progession of the game mechanics I am encorperating. The problem I am facing weapon wise, is once a weapon reaches above 2200 in spec, it only does 1100 heart damage. Every weapon beyond that limit does the exact same amount of damage. The armor I fully tested after posting this. What little I had found prior had been confirmed. The damage resistance that is placed on the sets of armor are not being deflected while equiped.

Example to that, a created boss has 500 attack damage, should be 250 heart damage. However, an armor set with 936 total resistance to damage should negate nearly all of it. When fighting the boss with that gear set there is anywhere from 100 to 150 damage. Minecraft's coding seems to have a limit on what these can succesfully do despite mods.

I searched prior to posting this and have continued to search for an answer and have yet to come up with anything that I can use to overcome this. Even the so called God Sword that one video had where imputing a give item code into a command block gave me a weapon with supposedly 99,999 damage. However, when tested it was only 1100 to 1200 damage.

I have verified the damage amount on the mods that I created myself with using only those mods and a testdummy mod. Damage output stays the same near 1100 regardless so I know it is not any of the other mods that are affecting the whole of what I am trying to do.

I thank those of you who are willing to give constructive feedback and I do hope there is a way to do this.

I have done all testing with both a test dummy mod and with custom NPC mod with created characters. I do not know if I must input some kind of code in order for this to properly.Perhaps some kind of world algorythm. If anyone knows how to get around this I thank you in advance.