The best way to level up a Giga on Rag is to get a bunch of wyverns to follow you on your griffin/ptera, then dismount you’re flyer above the Giga, then get on your Giga and absolutely destroy them. This got my Giga 26 levels from 3 wyverns.

I was so dedicated to get a wyvern my first time ever doing it I lost a 109 pteranodon 27 pteranodon a 28 argy and a 62 argy but I got a super good wyvern doing all of that was so worth it

To fight posion wyverns use a gas mask.

Will they be added to ark mobile?

Make sure to carry bolas on you..... so you can bola your friends and run