I did a parallel top balance on my 42kWh pack and after assembling it. the active balancer still had some work to do. Therefore, despite the extensive documentation suggesting top balancing is required, I think a case can be made for letting an active balancer to the final balancing if one carefully monitors that process. It may require slowly adjusting up the CV set point or letting the tail current taper longer. It is not something I would recommend for novices.
As much as I cleaned the cell terminals and bus bars and immediately applied NoAlox, my BMS still showed differences in internal resistance between each group of 3 buddy pairs. My pack is 3P16S.