You know what this deck needs?
1 silence.
That way you can hold your gasses in your hand, and play all 5 at once together with the silence so that they can't steal or deflag them.
Great deck, I like it.
Also, with this deck (the unupped version) I save my sundials until I'm at least half dead. That makes them last longer - you don't want to waste a sundial early in the game when they are only dealing you 6 damage. Usually, once I start chaining sundials this way, they last the rest of the game. Use caution however in case they have a strong weapon, poison, or a deflag for your sundial.