Only complaint I have is that it didn't have a page or a few panels explains why Ainz hesitated to kill Shalltear and why Aura had to give him a little help.
Momonga/Ainz Ooal Gown, The Overlord character with -500 Karma Rating would have absolutely killed Shalltear knowing (or at least fairly confident) that he can resurrect her back at Nazarick for 500 mil.
But Suzuki Satoru (the human player) didn't want to hurt the creation/daughter of his best friend at all (the only reason he fights her is to fix her mind control and to stop all of the "children" from killing each other), which made him hesitate for a split second, which Shalltear would have capitalized on.