The problem is that you cannot use potions to regenerate your HP/MP and/or power yourself up, so I recommend having Full HP/MP and buffed before you enter. Warriors (Especially Fighters) will MP wash (slightly slowly if you have maxed Final Attack) when using Slash Blast/Power Strike on those monsters. If you're out of MP and you cannot use MP potions, you're gonna end up attacking monsters normally like I always do on FC1 when he was level 20 to 30. If the drop rate is high, you could eventually get like 1000 each day, and even more if you're using a 2X Drop Rate Card (Like those 4 Hour ones). But the problem is that it is NX only. You buy the 4HR 2x Drop Rate Card and 5 Tickets each day. The 4Hr 2X Drop Rate cost 1.5K NX and the tickets cost 1.4K NX. 2.9K of your NX will be taken away each day. After 7 days, you're gonna end up wasting your 20.3K NX. (Unless either you bought the everyday one which saves you 2K, or rather not buy the 2X Drop Rate Card).
Edit: Forgot to tell you guys. 2x Drop Rate Card isn't required to enter the mini dungeon, but it is recommended if you want to get more crystals as possible (Especially if the drop rate is low).
Edited by FlameChocobo, 16 October 2008 - 05:03 PM.