http://bash.org/?3936
It's not just you that finds it difficult to TAS MMF games, it's everyone. If you want to try to pioneer TASing flash games in a consistent, repeatable, verifiable manner, you're welcome to try. But you'd be
pioneering, and therefore nobody else could tell you how to do it, because nobody
has done it.
Derakon's comment seemed to be a proof of concept that TASing MMF is possible
in principle. I doubt he had any particular tools in mind when he made those comments -- only the idea that such tools either exist or can be created.
Are you already a good TASer? If not, I
strongly suggest that you TAS a game on an established TASing platform first. Get used to savestate, slowdown, frame advance, luck manipulation, memory search. If you go for IWBTG as your first TAS, you will be trying to learn how to TAS at the same time as trying to develop a new technique for TASing MMF games. IME, it's far easier to focus on one skill at a time, and it will probably save you time in the long run. (An equivalent idea in rock climbing is "never try the limits of your climbing technique and your rope technique at the same time".)
Once you are a good TASer, then you may want to try your hand at pioneering a new platform.
