Ok first off go on a flyer to avoid any stress that yoy would have from being on land and get a dino that has prefferably 5k+ health and also take your flyer so 2 dinos to go and get bsck to your base the flyer is going ot be your main one and you'l always a male and female together so first, kill the male for pheremone, using your flyer tske the female wherever you want in a non dangerous wide clesr area then drop your other dino that you will sacrifice and keep your flyer at a distance in passive and then using your new dino that will get pregnant while the rhyognatha is attaking it get your harpoon launcher eith nets and net it then use a shotgun or anyother high melee weapon and once its under 500 or so you can use a normal spear as it isnt to strong to get him low and if it or isnt netted you feed the pheremone to ur dino thats going to be sacrificed and after you see a little warning or whatever besides it health and stuff run away ti where tou left your flyer and go someoewhrre even safer and further and then it will ask for cravings if you dont complete any it will come out very low level bye guys.