I studied the Warlord deck.

- Opening round should be the following:

Turn 1:
1: Tower
2: Barracks (2 mana)

Turn 2:
1: Mana Crystal
2: Tower

= At turn 3 you have 13 Mana channeling or more mana to afford any big hitters.
Lots of option here. You can deploy mid to big solider hitters during deployment phase and quick cast enchantment on them to help your Warlord.  From here most of the soldiers you sent can be afforded each turn.
= depending if your opponent is aggressive or not you may throw in some walls at turn 3 and set up your sniper on one of the wall tower. I am thinking of comboing wall and sniper on a tower.

= The Goblin Builder is a good card. Don't forget that he can cast conjuration (from what I can read from his card). I take this that it can build more walls or plant the catapult at a distance or plant more tower for more mana regen. The Goblin Builder is part of my deck spells. I normally would just make him run around the field while there are action going on a different part of the map for him to summon a conjuration (wall, catapult and outpost). He can be annoying when he tries to repair walls.

Earth elemental needs cheetah speed and teleports! Thats what I would recommend....Cheetah speeds and teleports. I would have a few less of each creature. (the x4 creatures need to become x2) and work on buffing those creatures with enchantments. Then focus on getting them in your opponents face with teleport and push. Less mana crystals, you could spend the action needed to cast it for something else, I would go with x1 moon glow amulet,it will not be a priority of most of the time.

Restrained removes flying and prevents flying. Since quicksand can only be played on a non-flying creature, you have to use a Knockdown or something to land the quicksand - but once it is on, the creature is stuck.