What is mos important in expression tools?

Question

Hi all i know that it is a stupid question. Please excuse me if my question hurt the stadard of your site.

I'm  a basic developer in C# i have been workng on WPF and silverlight but havenot used Expression tools yet.I generally do xaml.

Now n my system  have got expression studio installed but i dont now to use it.

I will have to use all the tools to design a page. der is web, designer, blend, etc.

I just want to know which is most essental.


Please help mei want to take a decision and ask our network team to install the acurate one.

Thanks
Rajesh.