HElP ME I GOT 2 PROBLEMS

First of all I feel that im way to weak for my level , im lvl 78 with just 61 000 damage per attack , I saw lower level players stronger than me, And lastly I got 121 jewels and I dont know wat to do with them either, CAN ANY1 GIVE ME SUM TIPS?

easy... save those jewels... try to get as many as possible saved up until you cant do it any longer then go attack world boss. once you have attacked it all you can use jewels to restore stamina attack again repeat this process until you have used half your jewels then just go back to regular attacking without jewels... save them up again and use them on the next world boss in the same way. this way you can double your chances of getting good rewards on both WBs. you should get some good monsters tha will skyrocket your atk. WARNING using all your jewels on on WB can result in really good monsters but it could be a waste of jewels as well. shoot for top 20% in attacks so you get 2 chaos and try to just hold that.

Thanks alot will do that