After quite some time, I've finally gotten the controller stabilized at the settings i wanted. Using a narrow range of boost, float and boost recon voltage settings and a short boost duration, this configuration boosts from initiation in the morning until 53.78v. It spends 10 minutes there then floats during full sun. If my load surges for more than a minute or two, or a cloud goes by and reduces the current for more than a minute or two, the controller drops back to boost for at least 10 minutes. The voltages have an added .16v increase from 53.60v to compensate for the difference in voltage between what the controller thinks, and what is measured directly on the cells. In full sun float with a steady load, the battery pack rides along perfectly at 53.6v, measured at the cells. A small cloud or short surge in load will not affect the mode and the system continues to float. A large cloud or extended surge in load drops the system back into boost and it quickly recovers the voltage, then returning to float. I have granular control of just how long i can go under reduced current or increased load without leaving float. I've also managed to keep the max voltage well under the limit.
I think this configuration will allow a greatly extended cycle lifespan and the charge cycle is running consistently at no more than 90%SOC at the top, and from 10-70%SOC at the bottom with the average around 50%SOC. It also allows the CC phase of the cycle to track in the graph, real time, instead of counting down a fixed amount and hoping that got it done.