I think Eris is way too kind. If I knew I would die anyway I would wreck havoc and do as m...

I would do the same.
I would manipulate male leads to clash and kill each other. and kill them myself if needed.
then cancel the engagement and marry some other prince resulting crown prince to lose the support of the most powerful family and whole noble society and in the end the crown.
if the world wants her down she should take it with her...

There you go. Strategem 1 I say.