Here i made several updated dungeon ideas, for the biomes:
1. General, stone layer
2. Hot biomes, desert, mesa
3. General, deepslate layer
4. Cold biomes, tundra, snowy taiga
5. Nether, spawns magma cubes
6. Underwater, I don't know how spawner may work underwater though
All spawner rooms are 5x5x5, though different sized for variety are okay. They also have cobwebs.
by dominicsapl