Calculator needs to be updated. I just tamed a lvl 30 and it took me 1,000 mejo berries. That's on an official server with 1x taming. Says it should have been 22 berries. And crops wouldn't work on taming either.
Pegos can be held in the beak of an argent (press c on pc to pick them up) and they will stay in there when you dismount. Holding the pego and then running and jumping at the argents face will let it attack you and take some food. It's a bit janky but I tamed a 150 this way when my taming pen was full
Make a 2x2 pen. Find a suitable pego. Put mejo berries in your last hot key slot. Stacks of 20 work better than 100. If you have a whip, use it once the pego takes the berrries from you. It'll steal every 10-15 seconds so stay next to it. If it's not stealing try whipping it or jumping around it (that seems to make them think you're running away like in the wild). Bring extra berries just in case! Soon you'll have a thief of your own to use against raiders and noobs alike.
Hint: Once tamed put on your shoulder and find a target. Then use a spyglass and whistle attack target. Rinse and repeat as needed.
Had about 80ish mejos in my passive tame slot while out looking for a mesopithecus.... Along came the pickpocket and BAM I had "you have tamed a dino" before I had evangelised I was being stalked, fresh server so I'd say he was maybe lvl 5-15 before tame
Knock them out and put them in a tent. While it is unconscious grab some berries and put it in your inventory, make sure there isn’t anything else for it to steal to tame it faster. When is is awake let it steal the berries from you and eventually you will have a tamed Pegomastax! Also make sure your tent is closed.
Don't knock out this dinosaur you tame it by putting a stack of mejoberrys in your last slot(0)or on Xbox left on depad then walk up to it and it should take the berries after doing that for a few times and you tame it you can get you items back just by accessing its invintory