@SAEEDUR RAHMAN - I have got Giga saddle blueprint by tributing the artifact of the strong (from the strong/yeti cave), and Quetzal saddle from the tannery (buy it from the game store), And In strong cave you can found high level direwolf (depending on your difficulty that you have choose at the starting of your game), eg. In brutal difficulty you can found 800+ level cave direwolf! For more info check my playlist - Ark Mobile Survival Series (Ep - 26 and 27)!
In brutal difficulty I have found 885 level direwolf, and not sure but I think this one is the highest level!! I think on brutal difficulty we can found more than 450 level dinos in 2 caves 1. strong cave (artifact of the strong), 2. swamp cave (artifact of the immune).
Times2 with the max level for example if you play in brutal the max level is 450. In the strong cave you can find the highest level is 450times2 which equals to 900. 😊