I had a real tough time with RDM Maat too, Bun. I'm pretty sure I went into double-digits... Then again, I actually found the process of going through the fight invaluable. Probably like most RDMs on the way up, I was a little too used to the support/pink-magey type role, so the whole idea of having to control an opponent, protect oneself, and ultimately triumph over it was obviously a massive ordeal with which to contend. I like to think it made me a better RDM, even though it was a royal pain in the {Tarutaru Stool} at the time.
Best advice I can give: Don't panic. (A "don't think about the pink elephant" trap in itself, but panic is the chief killer of all RDMs, especially soloists.) By the sounds of it, you're approaching it well, but it's the little things that make you slip up. Quick-thinking and using all your tools when necessary is what will net you the win, especially Sleep I and II, Bind, and Gravity.
I realise that's probably not exactly helpful, but... be shrewd and composed! You can doooeeet~!