I would strongly encourage you to bottom balance them instead. Parallel them, bring them down to 2.6V, seperate them and leave them for a few days. If any of the cells have internal shorts, the voltage will drop and you can see which cells are bad. If they're full in capacity, it's really hard to find internal shorts. If you have a few batteries with higher self-discharge rate, you can use them but you at this point have to have a BMS because they'll get unbalanced fairly quickly.
If they all float at 2.6V after a few days, put them inseries and charge them while watching each battery's voltage. When the first one hits 3.65V, it'll tell you that it has the smallest capacity and if it's too low, you can discard the cell. If the string is all fairly close in voltage when the first one hits 3.65V, measure the string's voltage and set your charger to finish at that voltage. Then you're good to go.