Same here, I have deranked much but, then, renewed the deck and for that reason or just because of good luck I am in Ethereal Diamond now.
Deception has many ways to beat Aggro Light...
Once, I won an Aggro Light guy and, then, hurried to play again in the hope to encounter the same deck of the same person. I encountered the same person, yes, but, this time, he had Control Light 😀 (I lost, of course).