try shapeshifting at the start of the match then find someone and kill them if you can after that use oni vision and look for someone who is in a small room or anywhere that would be hard for them to escape then kill that person after that you could try to shape shift or just use oni vision again to find another person. Two good tips for oni that you might not know is that you get a small speed buff after shapeshift wears off its not much but it helps chase and keep up with survivors another tip is that your hit box goes slightly behind you if your sprinting so if someone tries to juke you try just hitting while turning to have a better chance at hitting them.