Her attack might seem random, but it is designed to make her opponent fail and be unable to react to a sudden attack. She can even take care of future problems before they happen with the same move. The phantom spears that she produced continued forward through the space where the body of her opponent used to be to strike the person that wanted to take advantage of her. A new enemy had suddenly appeared from what she be her blindspot. But the phantom spears caught her new enemy by surprise and killed him too. Then she left her position to continue the hunt.
They say the weakest moment of a warrior is when he is relaxing after he has exerted himself to kill his prey. One concentrates and bring all their prowess to bear when facing an enemy. But there is a period of lax and lag that occurs when the enemy has been slain. The body and mind shift gear to relax after the exertion. It is a moment of recovery between exertions. This battle sage monkey sought to take advantage of the enemy that she was fighting. He hid behind the body of her enemy and stabbed through her to catch Salvini off guard only for phantom spears to explode out of the body he wanted to stab and stab him to death.
She can see her immediate future so she has no blind spots. It is a common mistake that people commit when they try to skirt around her divine ability. The divine ability of the sage is not a secret. Anyone that wants to attack her knows what to expect. They cloak themselves so that they can't be seen but it doesn't matter to Salvini because as long as they interact with her in any way, she will see them or at least, she will see the effect of their actions on her future self.
Everyone interacts with the world so no one is truly hidden. You can be seen if the person looking for you knows what to search for and has the right tools to search for it. She uses indirect tells to help her pinpoint the existence of whoever she interacts with. It might just be the depression in the sand that they are standing on or the way the wind bends around them or the fluctuations of gravity that their gravitational field causes on the world.
Even the faintest interaction with her will allow her to see possibilities and react to them. There is no way something that can kill her will be hidden from her. Her future vision will end abruptly at that point when she dies in the future. At most, she might not know what will kill her but she will know when it will kill her. That is enough information for her to prepare and avert her death. She will know when she has succeeded when her future sight returns past that point.
This ability is why assassinations don't work on her. They fail to realize that you can't hide the death of someone that can see the future no matter how well hidden you are. If a sage can't foretell their own death then they are not worth anything.
This mistake of utilizing the blind spot is common because the abilities of the eyes of sages are not fully understood. There is common knowledge about the divine ability but the principles by which their vision works are kept hidden. Those with the eyes are rare and they don't talk about their abilities as a general rule. This secrecy makes it difficult for their abilities to be countered by other bloodlines.
Secrecy is generally important but it becomes highly recommended when you are a highly placed public figure. People target her and her siblings on a frequent basis. The second person she just killed belongs to a bloodline that deprives people of sight. Their bloodline is called the royal bloodline of Vision Takers.
The bloodline of Vision Takers is a prestigious bloodline that nullifies or suppresses visual powers. They make it impossible or very difficult for someone with an ocular power to function around them and yet the person still died to her. It is because she has seen the effects of his ability before he activated it. The person was too late to activate their ability to stop her from doing what will change her fate. In a way, their bloodline will always be late as long as they don't have their ability eternally trained on her.
This hunt is filled with people like that. They are very talented and as such are capable of killing a lot of monsters. That has made them her preferred targets for harvesting. So they came together, decided on a course of action, and used their influence to gather thousands of people to execute her. Now she has thousands of people to kill for their scores and they are close to her too. She doesn't need to go looking for them. They have brought themselves to her.
That is probably the most frightening ability of those with the eyes of the sage. Apart from seeing immediate results, they can trace cause and effect into the far future and use it to predict certain outcomes. It can be likened to a game. She doesn't know how the game will play out, who will score what, or who will be injured, but she knows who will win.
So if she focuses on the future, she will know who will win. If she focuses further on them, she can determine where they are right now. She then uses that information to hunt them down. They in turn tried to eliminate her but they ultimately played into her game. Now they are close to her and the same outcome is being repeated in their rights. Nothing seems to have changed for the better about their situation despite their desperate attempt to end her. She is still killing them and it is easier to do too. So who exactly is hunting whom in this arena?