A lot of this question depends on where you are planning you mount your yoga swing. For example, if you are doing so outdoors and without the assistance of a stand then you can hang it with or without the trapeze system. In regard to whether you should do so with the daisy chains or not, that all comes down to how you prefer the height (which is the entire point of daisy chains). To ensure more height adjustment options, it may be in your best interest to use the daisy chains.
What is really interesting, though, is that you could use the daisy chains without the trapeze system, as well. You can hang the swing directly from them and while you will lose the 360-degree swivel, it can make it easier if you are traveling with it.