Apocalypse Temple

Battleground
A Berserkory spawns 2 seconds into the battle. Another Berserkory appears about 44 seconds later. A [http://battle-cats.wikia.com/wiki/Rain_D. Rain D.] spawns 21 seconds later. Yet another Berserkory spawns 21 seconds after that. The last Berserkory spawns 54 seconds after that. Another Rain D. spawns 18 seconds later. Nothing else but Ms. Sign spawns after all of this.

Strategy
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Trivia

 * This is tied for the most expensive Stories of Legend stage (as of 6.10) with Flame Caldera.