If you're going to use this for Arena, I recommend adding at least 1 deflag (even if you want to make it 31 cards) - there's a lot of annoying shields.
Adding some Rage Potions isn't a horrible idea either - you can use them on the Ash if necessary (there's a fair amount of Lobo's out there, and 5|2 can be better than 4|1 depending on the CC anyway).