Another award routing question, may be a little... complex

hello all. im a newly converted star alliance person. having lived in Atlanta for a while, I spent most of my days aggravated at how crappy the Delta skymiles redemptions were. anyway, im based in AUS now and have 70k UA miles to blow.

i've been doing research on UA's stop overs and open jaw(s?) policies... but im still confused, so here goes my question.

I'd like to leave AUS sometime in early May to anywhere in SE or E Asia. Anything that I can get for the low 'saver' award is fine with me. And I want to maximize the # of places in SE/E Asia I can get to using stop over/open jaws.

I also have to be in Denmark around the 1st of July. Now... I could cut my Asia trip or I could purchase my own ticket from Asia to Copenhagen... I'm sure that I can't come back on a United award from Europe to AUS since that would technically be a "RTW", right? So... if I have to purchase a r/t from Asia to Copenhagen, that's ok... and use my open jaw to get back to TX. Is this making sense?

Let's just say I end up with something like this (is it allowed?):

AUS - Seoul (~ May 11) (stop over)
Seoul - Singapore ( ~ May 20) (destination?)
hang out in Asia, purchase a rt on my own from SE Asia to Europe, return to Asia around July 15.
BKK - AUS (July 31) (this is my open jaw, right?)

Maximize this for me! Can I do another open jaw somewhere? Or stopover? :)^:D

Thanks for any advice.