How to Tame 4 Brontos in less than 30 mins with 140 tranq arrows (you will probably miss some shots so be smart about having extras like I was:)) 400 mejoberries 5 bows and no dinos on herbivore island

First aggro them and lead them to the bottom of a high cliff (the big crescent shape is what I’d recommend) with you on the edge at the top then if they can’t reach you fire away at their heads as the target and soon they will all tumble down and then you wait till 1/4-1/5 of their unconscious level is down then feed them each 100 mejoberries (100 to make sure you have enough) then in seconds you will have 4 Brontos

Hope this was helpful:)