This weekly dungeon is comprised of 15 floors. There’s a reward for clearing each floor with the ultimate reward waiting at the end for clearing all floors. The enemies’ elements changes weekly and it is strongly recommended to bring a full-elemental team that has advantage over the opponents for the week. The lower floors are pretty manageable with a mediocre team but the higher floors will have enemies with permanent buffs, that will be quite hard to break through even with a full LV50 team of SRs and SSRs. As such, it will always be a good idea to have at least one limit-broken and enhanced hero who can one-shot priority targets, like healers and support characters.
Take note that if you cleared a floor without reviving fallen teammates, you won’t be able to use those characters for the rest of the floors for that week’s dungeon. If your entire team gets wiped out, the game is kind enough not to cross out your entire team members so you can still use them for another attempt. If you’re stuck with only 5 usable strong characters for the entire dungeon and you want to avoid crossing out one of them, you can always abandon the battle if you’re about to clear the floor with no way of reviving your teammate.
Another useful strategy is deliberately passing with turns, especially when there’s only one enemy remaining in the wave. You may want to do this near the end of the second wave to cool down your heals, revives, and skill #3. Since the enemies in later floors will almost always have the first move due to their increased attack speed, it will be recommended to start the last wave with a fully-healed team with Skill #2 and Skill #3 on standby.