Epic
Blitzkreig (yes this German Word is where the word Blitz comes from. Blitz means "Lighting" and Kreig means "War". Put together, "Lighting War") tatics for both decks!
Although, for the earth one, I would replace mark to
and replace Balisk Bloods with 4 Graboids and 2 Shrikers
The fire one I would get rid of the Improved Fog and the Wind Towers and put in Fire Pendelums along with 1 more Upped Phoenix and maybe even a Wyrm. The Doubling ability would be amazing due to 6/10 damage that the enemy wouldnt have enough CC to get rid of quick