BQ25505: Best parameters to charge a lithium cell 680mAh cell

I've been playing around with the BQ25505 for some time now and I get mixed results.  I really like this device because of its multiplexing capability.  I would like your thoughts on the best parameters to charge a small lithium cell.

I have here a Voltaic solar panel (pn: p124) that has:

• Vmp: 6.07V
• Voc: 7.09V
• Imp: 0.20A
• Isc: 0.22A

I understand that I need a clamping diode to keep it under 5.1V. 

I've read a number of different posts about where I should clamp it down to.  3v? 4.1V?

If I clamp the voltage, what should my MPPT be set to?  Should be set to what the voltage is clamped to? or 80% of that voltage?

Is this the most optimal panel for this job?

What kind of VBAT_OV, VBAT_OK, and VBAT_OK_HYST would be best for this panel?

If this isn't the best panel for the job....what kind of parameters should I be looking for in a solar panel?

and with that different panel, what kind of VBAT_OV, VBAT_OK, and VBAT_OK_HYST should I consider for it?

My circuits are copies of the reference design of the eval board.

Thanks for your help.