I'm probably the only one that's still playing, but anyway.
It seems that dual-color with yellow is pretty good in arena atm even though most people seem to suggest tri-color is better. I got 7-0 crusader, 7-2 crusader, 7-2 spellsword and 7-1 mage.
Yellow just seems to have the highest quality of cards and adding more colors just seems to dillute that.
Oh, and just in case you weren't aware, the newest expansion has been out for few weeks now.
