I’ve found that the best method are tranq darts, the reload time on longnecks allows the over time effect to work most efficiently. Take a tapejara or pteranodon to a cliff and either sit on top of or latch onto a cliff, then go to town on it. Works best in one of those little river valleys, block off either side so it can’t run.
Hey, ok so the center, coordinates 08.1 / 63.4 spinos will spawn there, if is not high enough just kill it, leave the area and come back after 3 mins. Normally works, I found a 150 and I'm taming it rn
stand on a high cliff and shoot it or keep shootong it and running away on a raptor until it's knocked out. it gets distracted very easly by fish, sharks and manta's (even while chasing you) so you may want to shoot it while it's distracted.