Buy a low level quetz off an alpha make a catcher*, go to red on and kill low levels till you get 140+ with good health role. Make a platform saddle and build is so ramps block the bottom, put mini gun on the back and pump movement speed. = dragon assassin. You won't have to worry about scorched earth trolls anymore lol.
The fun way is to jump off and grapple to your argie and whistle it to attack and since argies are slow it won’t catch up in time so tranq till it goes out also bring parachutes and consider liking so more people will know
If you drop a quetzal due to knockout, and it lands next to a giga...just know, the quetzal belong to the giga. Now you get to watch your would be quetzal get eaten by a giga. Now you can go home and cry.
If you manage to knock a quetzal out, try starve taming. If you never tried starve taming it’s just leaving a Dino’s hunger go to half way or lower and then you start feeding. I’ve done this many times and it’s very useful taming trick.