"Cycling the cells to find weakest one": I assume this means that number the cells, and keep a track of which combination of cells gives you highest current/voltage?...
Number each cell - check
But, then charge, discharge, charge, discharge, etc. for whatever number of cycles it takes, to get them to max capacity, keeping track of their fully charged voltage - right out of the charger and with a stable and repeatable load of 0.56 Ohm to 1.0 Ohm (5W) would be suitable.
First measure the unloaded voltage (and write it down), then, while still measuring the cell voltage, load with the resistor while counting eg. 5 seconds and write down what voltage it have at that time.
Then discharge the cell to say 1.1V with the same resistor, recharge and repeat until two sequential charges show the same (within a few percent).
You may see this as a bit too much work and admittedly, it is a lot of work if you don't have/make some kind of ATE for it, but the cells are gonna love you back
Finally, when you've been through all the cells, select the best (those with the least difference between unloaded and loaded voltage) for your battery and put a few of the best (of the rest) aside for later replacement of single cells.
Also those chargers look great. Though the descriptions dont tell us that the NiMh cells cannot be balanced.
Perhaps not, but they're made for Lithiums, so even if their balancer modules could handle the lower voltage of Nickels (which I'd think they cannot), there won't be enough lines for your battery (you'd need 11 lines).
However, as you're going with holders, you don't need balancers. Just check each cell with a voltmeter and if you have some that are either higher or lower in voltage, charge them in sets, so they all have a chance to go to the max.
When they're all at the same voltage (within say 10..15mV), you can equalize them by applying a current of 35mA to 50mA overnight (or up to say a couple of days). This can be supplied from a 15V wall wart with a series resistor of 22..27 Ohm, or a slightly higher voltage with a simple LED+transistor constant current generator.
If you have a spare PC supply and know how to up the 12V line to around 18V (or have any 18V/5A supply), you can make a simple taper charger that, while not being particular fast, will (per definition) end each charge with a low equalizing current.