I'm not a particulalrly good flourisher but I found most of the flourishes to be attainable. Akira, Mecka, Molecule 4, Eko and Tectonic verb are not especially hard (of course they will need a lot of practice if you want them to be smooth).
If you can do the OHR and some Sybils you should be fine with the easier flourishes.
The sleights required for most of the tricks are not too hard but it is hard to get them looking anywhere near as smooth as Dan and Dave. The effects on The Trilogy don't really work if the performance is sloppy. So be prepared to put in a lot of time to learn these effects properly.