Does it get u better season rewards out of loot chest if you advance to a higher level near the end of the season but earned all of your chests in the lower level?

I have just enough card power to advance to Silver 3 from bronze for the first time. I can win and collect loot chest comfortably in bronze 1 but am worried it will to a lot harder in Silver to win with my current cards.

I am thinking my aim might be to advance on the last day of the season if I can maintain my focus points.

I surpose I have to weigh up missing out on possiable Silver daily focus rewards.

Maybe I need to save more resources for some Level 3 summoners and monster in Silver 3 ?

!PGM
!ALIVE
!LOL