So, I'm quite a good player on Tap Titans 2, Heres some tips :

-Dont Spend To Much Time On Heroes, but pay attention still.

-Try look for the fairy's, they can boost you.

-I recommend prestiging asap, over and over, I found it very very usefull.

-Upgrade Hero

-Dont upgrade power ups unless you dont have anything else to spend coins on.

-Join a clan

-Try get a full item setup

-Upgrade the good relics