Short answer - Just wait, stack cards and wait. They may put down 1 or 2 guys that can damage your relics but they will fill all the other lanes with structures that cant attack your idols.
I literally went about 40-50 rounds (can't recall exactly) getting about 30+ resources. When I finally had all the cards I wanted, I had the following units:
- Blessing of Haste x2
- Focus x3
- Skirmishers x4 (there are 2 types of skirmishers)
- General x1
- Vanguard x1
- Plate Armor x2
- Frost Wind x1
- Haboinks x2
- Decimate x3 (Not in the starter deck)
The scary part comes next, you will play your General and Vangaurd in a row together pop Plate armor on them and use Frost wind on the enemies in direct line with them to make sure they dont hit you. wait one turn, Hope your General and Vangaurd survive 1 health or more doesn't matter you win if they survive. Put down all four of your Skirmishers adjacent to your General then use both blessing of hastes on your General to bring it's Cooldown to 0 which at the same time will bring all your skirmishers and vangaurds Cooldown to 0. Now you play everything you got to increase damage so that you destroy everything in the three rows. Make sure you place spells wisely so as to not waste damage on idols your goal is to destroy everything so that 3 turns later you win.
It takes patience but it feels o so good after putting them in the dirt. This has worked on 2 occasions in the trials against Energy decks. A serious flaw in AI in my opinion.
