
Actually we don't really know since in the past, she died before we could hear if he did something after a long time of preparation. As he said, he was going to marry that *** to be able to achieve what he wanted without encouring the risk to lose. So losing a bit to win more.
Anyway we all know that it was her destiny to reverses the hourglass and to help the crown prince to take the lead. ╮( ̄▽ ̄)╭
IT WAS HER DESTINY TO DIE AND REINCARNE ONE MORE TIME. :')

But I'm pretty sure in arias previous life he did become Iris' pawn especially after his huge failure with the casino. I think she mentioned he basically had no power and the nobles were in control just like with his father. But when Aria came she gave him advice and as well as help improve his influence with her investments and with her revenege he was finally able to take down Iris and her family and the rest of the nobles.

Well in what I understood he accepted to marry Iris and be a pawn so that he can still "manage" to take them down by the inside (but he said it would have taken a lot of time then)
Well I'm in the minset that it was their faith. Aria was destined to die once by stupidity to be able to "grow" and Asher was destined to be helped by the Newly-Aria.
So in my opinion, she didn't change anything. She just went to her faith (๑•ㅂ•)و✧
A new villain has appeared!! Also lol Aria is much more beneficial to Asher than Asher is to Aria if we're being real here but he is a help