If you want your mod to be stackable then you’re going to have to do it all custom. Otherwise, I’m sure you can just make a TC and change the files how you want.
I never messed with the bosses but I do know of a mod that takes the normal game bosses and lets them be spawnable on the map with same stats, as “world bosses”, they are also tamable.
While typing this. I went into the ADK and did a quick search “Tribute” It pulled all tribute BP’s. Wasnt too hard to spot the ones that would be needed. Just make copies. Change the “required” items and make it admin spawn only. Place a few down where you think people will enjoy them. Or slap em right next to the original terminals.
As far as this mod goes you should only need to edit a couple files. Everything else should already be linked together. I pulled up a few BP’s and screenshot to show you. Hope this helps.
Since it’s your first mod. Make sure to copy everything into your own mod folder/rename them, before you do any edits.
This should contain all the asset files related to bosses. Please note the files in the screenshot first, then this list.
[SPOILER]
│ PrimalGameData_WorldBosses.uasset
│ WorldBosses.umap
│ WorldBosses_DinoTamedInventoryComponent.uasset
│ WorldBosses_Dino_Character_BP.uasset
│ WorldBosses_ElementDrop_Item.uasset
│
├───Dragon
│ WorldBoss_DinoAttackStateMelee_Dragon.uasset
│ WorldBoss_DinoAttackStateMinionsDragon.uasset
│ WorldBoss_DragonAttackStateFire.uasset
│ WorldBoss_Dragon_Character_BP_Easy.uasset
│ WorldBoss_Dragon_Character_BP_Hard.uasset
│ WorldBoss_Dragon_Character_BP_Medium.uasset
│ WorldBoss_Dragon_Entry_Easy.uasset
│ WorldBoss_Dragon_Entry_Hard.uasset
│ WorldBoss_Dragon_Entry_Medium.uasset
│ WorldBoss_Wyvern_AIController_BP.uasset
│
├───Gorilla
│ WorldBoss_Gorilla_AIController_BP.uasset
│ WorldBoss_Gorilla_Character_BP_Easy.uasset
│ WorldBoss_Gorilla_Character_BP_Hard.uasset
│ WorldBoss_Gorilla_Character_BP_Medium.uasset
│ WorldBoss_Gorilla_Entry_Easy.uasset
│ WorldBoss_Gorilla_Entry_Hard.uasset
│ WorldBoss_Gorilla_Entry_Medium.uasset
├───Manticore
│ WorldBoss_Manticore_Character_BP_Easy.uasset
│ WorldBoss_Manticore_Character_BP_Hard.uasset
│ WorldBoss_Manticore_Character_BP_Medium.uasset
│ WorldBoss_Manticore_Entry_Easy.uasset
│ WorldBoss_Manticore_Entry_Hard.uasset
│ WorldBoss_Manticore_Entry_Medium.uasset
│
├───PrimalEarth
│ └───CoreBlueprints
│ ├───HarvestComponents│
│ DinoDeathHarvestingComponent_Huge_MeatOnly_AndChitin.uasset
│ DinoDeathHarvestingComponent_Medium_ChitinAndHide.uasset
│ │
│ └───Items
│ └───Armor
│ └───Shields
│ PrimalItemArmor_TekShield.uasset
│ ├───Progression
│ Engram_WorldBossesProgressionObelisk.uasset
│ Engram_WorldBossSpawner_Spider_Easy.uasset
Item_WorldBossSpawner_Spider_Easy.uasset
│ PrimalInventoryBP_TributeTerminal_Base_WorldBosses.uasset
│ PrimalItemStructure_WorldBosses_ProgressionObelisk.uasset
│ WorldBossesStorageBox_ProgressionObelisk.uasset
│
└───Spider
WorldBoss_Spider_AIController_BP.uasset
WorldBoss_Spider_Character_BP_Easy.uasset
WorldBoss_Spider_Character_BP_Hard.uasset
WorldBoss_Spider_Character_BP_Medium.uasset
WorldBoss_Spider_Entry_Easy.uasset
WorldBoss_Spider_Entry_Hard.uasset
WorldBoss_Spider_Entry_Medium.uasset[/SPOILER]