There is no root exploit that is known at this point to root the replenish at FA19. That being said, Firehak as been working on a ROM release that will be rooted and based on FA19. In addition, I will be releasing a modified FA19 based kernel in the not to distant future that will also be rooted. Firehak's ROM uses the faster ext4 filesystem, and my kernel release will assume use of ext4. You, being on stock, are using the slow RFS filesystem. So your best bet is to wait for firehak's phoenix ROM release.