Frost Wyrms
Here's my build:
3 acolytes to mine, ghoul to wood
4th acolyte builds zig, crypt, altar, then to mine
5th acolyte to gold
Crypt and altar finish
3 ghouls rallied at wood
Build Lich at altar
Throw down a graveyard and another zig
Upgrade to Halls of the Dead
Graveyard/ Halls finish
Build 3 crypt fiends
Upgrade armor for fiends
Build Death Knight
Start creeping with 3 fiends, Lich, and DK
Upgrade to Black Citadel
Build Sacrificial Pit
Upgrade armor and attack for fiends
Black Citadel finishes
Throw down 2 boneyards
Expand
Build Dreadlord (optional)
Finish upgrading fiends/wryms
Start pumping frost wyrms when yards finish
Lich (Primary Hero)
1 - Nova
2 - Armor
3 - Nova
4 - Armor
5 - Nova
6 - D&D
7 - Armor
8 - Ritual
9 - Ritual
10 - Ritual
Obviously you wouldn't want to ritual a frost wrym worth 450 gold! With the lich, the main concern is getting level 3 nova
Death Knight (Secondary Hero)
1 - Death Coil
2 - Unholy Aura
3 - Unholy Aura
4 - Death Coil
5 - Unholy Aura
6 - Death Coil
7 - Resurrection
8 - Death Pact
9 - Death Pact
10 -Death Pact
The Death Knight is what keeps your army alive. Coil is helpful in the early creeping situations and level 3 unholy aura will really help your units' hp regeneration
Dread Lord (Third, Optional Hero)
1 - Carrion Swarm
2 - Vampiric Aura
3 - Carrion Swarm
4 - Vampiric Aura
5 - Carrion Swarm
6 - Infernal
7 - Vampiric Aura
8 - Sleep
9 - Sleep
10 - Sleep
Sleep last?!?! Am I crazy!?!? Sleep only takes mana away from carrion swarm and that's why we have this Dreadlord, for the carrion swarm.
Supply List By late game you should have 10 acolytes on mines (10) 4 ghouls on wood (8) 3 heroes (15) 8 Frost Wryms (56) Total 89
Mercenary Rush
1) Put all your acolytes to the haunted gold mine. Make the ghoul start harvesting lumber.
2) Queue 2 acolytes
3) Pull one of the acolyte out of the gold mine and build Ziggurat, Crypt then Graveyard.
4) Build a second crypt
5) After the first ziggurat is done, start producing Death Knight
6) Queue 2 ghouls on the first crypt. When the second crypt is complete, research cannibalize
7) Start leveling up with your hero and 2 ghouls (at least 2 ghouls)
8) Build 2 ziggurat at this point – this is done to leave enough headroom for the mercenaries you will hire after you take over the mercenary camp.
9) Keep producing ghouls
10) When you have enough money, upgrade to the halls of dead
11) Build one more ziggurat
12) Around now, your hero should be level 3 at least. Make sure to get death coil – it is important that you keep your army alive. With cannibalize and death coil, your army should be quite durable.
13) After you have purchased all the mercenaries, start producing crypt fiends / necromancers.
14) Before you start attacking, visit the goblin merchant to buy scroll of protection and scroll of healing. This will strengthen the integrity of your army when engaging in the battle.
15) If you have money to spend, buy a zepplin, preferably for killing your opponent’s heroes and the surrounding units.