If you make your base on the south side of the wyvern heir nest on crystal isles and one of these bad boys spawn at your base I have no advice but to abandon all hope and let it destroy everything you own because it will kill you and everything you own unless you have something rediculesly strong (btw these things spawn south of the crystal heir nest in the desert on crystal isles so now you know where not to build or where to find one)
Brontos rexes everything strong but not strong enough this dino is feared by all absolutely no man can encounter and survive your only hope is it gets interested by something else intelligence wont save you with this one its not bains over bronze anymore
I spent an hour taming a Max lvl anky on a ledge. After about 20 minutes I looked down and 2 gigas were below looking right at me their heads almost reaching the top of the ledge. They stayed there the entire time
If one is encountered near water, you can simply lure it out to sea with a flyer and it will swiftly drown. Given the water is deep enough. If encountered inland not near water. Pray to the overseers you have something fast enough to out run it. Then promptly die because they're as fast as a mad Hispanic mother with a shoe. Not as deadly as one though.