I think with 59 snails in a 55 gal
you are going to have them everywhere. They are enjoyable to look at and watch and like Marc118 said those cleaner packs for a 55gal tank usually have about 1 per gal
. I would try starting with about 1/2 your list and see how you like it. I only have 12 in my 75, and I'm sure with 50+ they would be everywhere, but eventually I plan on around 30.