You can use commands to try the boss system out. Use GFI command for the different tributes. https://ark.gamepedia.com/GFI_Codes Use gmsummon "dino name" level number. Example gmsummon "rex_character_bp_c" 120. Tame that 120 rex or use command, dotame, after that. Use gfi rex...
(yes I am a Dilo addict- why do you ask?), AND lvl 6 Raptor Resilience- along with several dino eggs I was about to use to tame the darn thing. Those were all my first tames, by the way. (R.I.P to them- rest their souls, likely still haunting me to ...