Ah, true, the old "cat" room... Same sh1t and yes, it is possible, but very rarely and for 1-2 million dils extra is not worth the try. Besides, you can't farm there either, no exp from mobs.
Do all the quests, specially "Main". Besides that, do Infinite Battle rank B in Draco (exp talisman + runes) until 130 (then switch to Crespo IB rank A) and do Deux Marble dungeon in Maze (with Camouflages you can do 3 extra runs). When you do Deux, go through lower dungeons, it's easier at your level and even gives you more exp, specially with runes. No need to spam any other dungeons until level 170, then you can switch to IB2 in Deadlands...
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Its the room on the right top corner where u need to be faster than him killing the mobs.
Btw off topic. Im lvl 123 where is the best way to level? Only Maze?