At least for now.Brick and sysNAND in the same sentence will never make anyone comfortable. If something happened to arm9loaderhax you would have no way to restore sysNAND.
Once A9LH improves, you probably won't be saying that anymore. At the moment, you can simply have you emuNAND on 9.2 to be able to use Decrypt9 (in case you need to backup or restore your sysNAND).