Can someone help me?

Hi I wanna know how much damage and attack i would need to get top 20% constantly without/with lvl up.  It wouldn't hurt to tell me what team i need to get S rank in lvl 100 dungeon   thx

To tell you, I would have to do the same you should do:

Check the last wb and take a look at the ranks!

For your second question I would have to search the forum. There exists already a sticky thread about dungeons/dungeon rewards...