RDM Maat is a good deal about luck. At this stage of the game, strategies on beating him are pretty well known. Still doesn't mean things can't go wrong.
It's not impossibly hard, it's simply one where there's no 100% strategy to win with, other than "go get another testimony and try again". There's always the possibility that he'll Asuran Fist back to back, or Chainspell nukes after sleep resists, or whatever.
Really, Alla has at least one post a week like this from someone who walked in, things all went their way, and won first try, so they feel compelled to come tell everyone how easy it is/how to do it.
I figured if anyone would agree with my point of view on him, it would be BG.
...and that's why BG has the rep it does I guess. If you really know your shit, prove it by helping people instead of belittling them.