the arena seems kind of screwed up. I have been playing a little over 2 days, and have not a single bam in my entire deck, yet I still get paired with people who have many of them. to put this in perspective my all time score hasn't passed 10000 yet
How to make money quickly. First buy the Bat. Then get handstand and handstand wheelie. When you summon Cleatus by hitting corn keep spamming down,down,up so that when you're near the ground you will get points for the handstand wheelie and you'll get an additional trick for Air2Ground which will always increase your multiplier, keep spamming till content.
Ok, here's an easy way to beat the doom frog as a scout in the arena. First off, level up to 33 so you get kidney shot. From there simply alternate between Kidney shot and Sucker punch when they each reach the 1 turn left mark. Attack between these points and the battle should be easy, if extremely long.