Help with damage output

Just started playing again after a long break. I know people complain but it still a solid game and the wait times aren’t as bad as the were when I quit.

Lost most of my early games then had an epically long win streak. Seem to be about half and half with a slight bias in the red now though, with somewhere between 60-70% for the season, which I thinks alright.

But my damage is typically sub par the last few days. Got random grouped with a guy I used to game with regularly before I quit and he chewed me out about it.

Any tips to help me out. Been playing Lunara quite a bit?

Thanks.