So currently i’m stuck at Riat path,can’t beat that one guy who appears. Can you give me so advice as to what I should do to get stroner?
Use more strategy or get more rare/semi-rare arks!
I’m guessing your team is like using the best star ranked arks possible right? You could make use of Kentucky at the early stage of game, it can haste and stun. Use it combined with your strong arks to AOE stun the opponent, if not working, use multiple of them.
With catching the rare/semi-rares you’ll just need patience~ there’s all starters and all hatchlings catchable at right the beginning of the game also along with a few excellent semi-rare arks available at where you start the game. Read the forum and you’ll find plenty of the Infos, good luck 
I know you said catching certain monsters using their moves + strategy will help but where can I farm for levels also? Does onlline mission give decent exp?
Quests give you a good amount of rewards too. And the arena as well!