Pushed the apps that I needed into the system (ArtFilterCamera.apk, CameraCommon.apk, SemcCameraUI.apk & SomcCameraWidget.apk) and installed the others as normal apps. TimeShift force closed for me but I installed the play store version which worked fine. As for the SomcChinaPhotoEditor.apk; it is simply an advanced version of the stock photo editor, it is required by SelfPortrait to work.
Hats off to the dev/op
. What I would recommend is to push the core camera apk's (listed above) into the system and install the addon apps from the play store.
I own the Xperia SP (sig)-if it helps.