speaking of debussy- what's going to kill me in the toccata?

[Tash]

i'm a bit worried i'm going to end up butchering this piece because of a lack of technique, but so far i'm not doing too badly (after like a week of playing it as if i can comment yet!)- i've vaguely sightread my way through the entire piece and the only thing i really had issues with was the giant mash of double sharps and whatever else, but that's not a huge problem. however probably later when i get it faster the hard bits will pop up- so since i'm obviously ignorant, can anyone give me an idea as to which bits are going to give me the most hell so i can give them a bit of extra practice to begin with? thanks heaps!!

oh and also, what's the difficulty of the prelude in this suite compared to that of the toccata and sarabande?