Calamity Keeps Crashing in Multiplayer During Boss Encounter (RESOLVED)

[TheBitSquid]

I am doing a calamity play through with one of my friends. and whenever we encounter a boss, his game crashes sometime throughout the boss fight, this problem has been happening over the past few days and it means that we are not able to play together. If someone could help, that would be greatly appreciated, as this bug is extremely frustrating.
(UPDATE: Now when ever I join his world, his game freezes and crashes without fail, this is very annoying as now we cannot do anything together on his world)

[TheBitSquid]

Here is a list of all enables mods(libs have been ommited)
Calamity Mod
Boss Checklist
LuiAFK Reborn
Better Magic Missiles
Alternative Gem Staffs
Does Not consume mana
Shop expander
misc NPC vendor items
Mount and journy
Craftable
MooMoo's Ultimate yoyo revamp
Catalyst Mod
Calamity's Vanities
Auto Fish
Fishing Merchant
Calamity Wrath of the gods
Fargo's Mutant Mod
Auto Potion
WADTU
Begone Evil
Plentiful Ores
Extra Accessories slots
New Begginings
Recipie Browser
Ore Excavator
Alchemist NPC Lite
Lights and shadow
Biome Titles
World Link
Not Consumable Boss Summon Items...
Boss Intros

[TheBitSquid]

That isn't the problem, once the boss spawns in, his game is fine, its around 2-4 minutes of fighting that his game freezes and crashes, but I will still try disabling boss intros to see if that helps. (Note, this is only happening in multiplayer)

[Atomiek]

That is a whole lot of mods, you should check for mod conflicts by only having a few active at a time then continuously adding some until you encounter the problem.

[TheBitSquid]

I have disabled some mods and all is well, thank you very much!

[Saku]

wich one because the same happened to me ?