If you face no error in bga 221, means that ISP adapter is working fine.
So, the problem is for ISP with bga 254 only right?
Doing ISP is for recovery purpose only, and sometimes it's very difficult, because of the variety and different set of components layout in each device.
Here are some trick you can try:
1. Make jumper wire as short as possible.
2. For device with PBL active, you can bypass VCC and VCCq in iSP by using USB.
3. Take a look at CLK resistor, connect the jumper cable to the end of the resistor leading to emmc.