This is not a single-type dungeon. The enemy pool covers Flying-type, Normal-type, Poison-type, Rock-type, so check the reward route and main enemy types first, then swap in Electric-type / Psychic-type / Rock-type attackers.
Deal with Pebgolem, Chirphantom, Volcrest first, then clean up the lower-threat enemies. Because this dungeon has multiple waves, keep at least one slot for a tank or sustain option.
Do not overbuild for only one wave if that makes the next wave counter your whole team. Most incoming damage is physical, so use a frontliner with solid HP and Def.