I found that playing at different times throughout the week helps a lot.

I work all day then come home, spend time with the wife, then when she goes to bed I stay up a bit later and play.

So all of my arena matches have been late at night.

It seems the competition is a lot stiffer at night..

Last week, I had Thursday and Friday off. I played 3s and 5s around 1 PM my time and it was a completely different scenario.

My opponents were all 1900+ teams but felt more like 1600 teams. I won 15 games in a row and never once face the same team.

My 3s team got to 1985 and my 5s team got to 1886. Seems like mid-afternoon during the week days is the best time to play.