When I have a bunch, I do it in stages.I can only have 1 roo. I have no idea how to chose 1 to keep out of the bunch.
When you have a bunch, they tend to divide into three groups, more or less. Keepers?, Jerks and ones you just don't like, and the in-betweens. Now generally the jerks are easy to identify, don't second guess it, they go in the first cull.
Wait two weeks, as removing cockerels, will change the remaining cockerels - sometimes for the better, and sometimes not. Count how many birds you have, and divide in half. Now if that produces 6 birds, well just go with a gate cut, in other words the first three you catch are gone.
Wait two weeks again, now you might try out a single cockerel with hens - see how that goes. Or if you have all of them in with them see how the ladies like it. Personally I like to pick my top cockerel, pull the other two, and wait and see if I do like it, if my hens like it.
But the biggest thing is to be aware that NONE of them may really work out for you, and if they don't, cull them too.
Mrs K