I'm grinding to level cards and I'm wondering what's the most efficient/fast way to grind when leveling cards as fast as possible is your only consideration.
.5 cost levels and 1.5 drop levels are one way that seems good, I'm only doing the higher rounds not the early ones.
Jewel dragons is the other way that seems good but I don't always get maximum chests even at 5 gold spins.
Does anyone have any opinions which is faster or have a better strategy I'm not considering?
Thanks guys!