Table of Contents
Video Showcase
General Strategy
To simplify things, we have color coded the teams to help players keep track of the arrows shown below.
Red Arrow = Team 1 bossing team
Yellow Arrow = Team 2 Explosive
Turn 1

Team 1: Start off by moving team 1 towards the right side with an enemy waiting.
Team 2: Followed by moving team 2 downwards towards the enemy
Turn 2

Team 1: Continue moving towards the tile downwards.
Team 2: Move to the left right below the enemy above.
Turn 3

Team 2: First of all, make sure for turn 3 and onwards that team 2 MOVES FIRST. Have team 2 go upwards to fight the enemy above.
Team 1: Followed by swapping positions with team 2 and moving to the tile on the left towards the boss.
Turn 4

Team 2: If turn 3 was done correctly team 2 should now be at the top starting tile, you then want to move this team to the left to step on the activation tile.
Team 1: With the tile towards the boss now activated, you now want to move towards it to finish up the stage
360 Sec Clear

Getting a 320 sec clear is pretty straightforward. Start out by having your bossing team at the lower starting point, then a throwaway team at the top. From here, you will want to move your throwaway team towards the activation tile to the left, then simply follow the image above to reach the boss with your bossing team.
Team Building

Team building for this stage is relatively simple, spread out your AoE Explosive damage dealers for both teams to ensure that you have enough damage to deal with mobs. After this, you can fill the rest of the slots with other roles, such as tanks or healers.
Character Recommendation
Note that characters listed here are only some of the viable options
Explosive AoE:
General Supports:
Healers:
Tank: