I have the following machines

1 1700 8 core
1 2600k 4 core
4 g4560 2 core
1 1090t 6 core

Is it better to direct them to the main pool or the aro.cool one?

I intend to use 12 threads for 1700 6 threads for 2600k and 3 threads for g4560. I think 1090 will have small production so probably best to avoid, is this correct?