THey are one of the best ranged units in my opinion. Way too many ways to utilize them - and mark of blood? Combine it with a decent level ball of lightning and phantom spell (to get multiple marks in a round) and you can drop a huge stack army in a few rounds.
Quite simple actually... Especially as a mage. Just ensure you have enough rage.
Gorguanas cast mark of blood on their biggest stack
Dragon summons ball of lightning close to it - if there are no other dangerous stacks, it will hit just that one.
Cast awaken dragon - 10 mana, so you have a second cast.
Cast lvl 1 phantom on the gorguanas (no need to waste mana for a tool)
Use their mark of blood on the second largest stack.
Dragon casts a second ball of lightning.
BB 2 big stacks
