For emmc dump files, you can try direct write the stock firmware via factory image tab in UFi eMMC ToolBox.
Firmware for your device model is already available at support server.
For replacement emmc procedure:
1. Download CSC firmware (mark with number 1 in picture below), and rewrite emmc via Factory Image.
2. After device fully boot, re-write Imei by original one.
3. After success write Imei, flash user firmware, download in support server, mark with number 2 in picture.