edd5190, i got ability points pretty fast when i betted 640k for red always. It seems that red one has lil bit better chance to win than others and using 640k you get always ability point when you guess right... And i know that it's money wasting :)
You can never get idle mode to 100%, the game just rounds it when its close enough, but still it isn't 100%. Anyway, it doesn't really matter if it is 99% or 99,99% or 100% :)
basora, if you've equipped any lvl 3 set (mystery/army/pirate/christmas/greg/kongregate) it will automatically turn to Epic set, making the sets bonuses even better
Now i tested using only Quick strike, in 10 minutes i did get 6m coins and 8m exp so it was lil bit better exp. But i recommend using godly strike, not because the coins but for your own sake, it's really a pain for your finger using only quick strike :D
I just tested how much exp and coins i can get in 10 minutes if i'm active and fully concentrating on Battle arena. I mostly used Godly strike and couple Quick strikes, refilled with mystery points and i used epic Mystery set to get mystery points. In 10 minutes, i got about 8M coins, 7,5M exp and 200 mystery points (would have been more without mystery points refills). So in 1 active hour i could get almost 50M coins and about 45M exp, i just hope that the new arena is as good :)