How do I solo bosses now

With the new party matching system, how can I solo bosses? and how does this system actually work? thanks.

just create a normal party then go wack O.o ?

but when in party it still looks for a match;/

You can just walk to the boss area and click in. You don't need to use the boss window.

Even if I want to solo a boss I usually just use the boss window anyways, it's a free teleport and then you can just leave the party xP