I had a 125 DEC two days ago and an 854 rating in Bronze ll. I rented Angel of Light today ( A regular foil legendary card which gave me 1500 power combined to compete in Bronze ll).
I was unable to play the game for two days. For the first time, I reached a rating of 1009 today. After renting Angel of Light for a day, I ended up with 166 Dec and a 69 percent capture rate.
Daily quest rewards:
One Alchemy potion
2 Credits