Mateus is a dude too. xD

This battle was VERY easy for me because I had two Demonsbanes at this point =]

IF you beat the FIRST Demon Wall, you can access a secret section of the tomb which possibly leads to a chest (soft reset if you don't see it) and this chest potentially contains a Demonsbane (59 ATK if I'm not mistaken) which gets you dealing about 500 dmg at this point in the game (which is pretty whoa). The chances as I remember are about 1 in 6, and the chest respawns (which is why I had three) so it's not even that annoying. But beating the first Demon Wall means getting very lucky with Quickenings.