Well, in a pot it's less at risk, but you won't be able to keep the thyme and sage in the same pot next year. Sage gets quite large, it's really a sub shrub, and thyme will get 8 to 10 inches across. Dill is an annual herb and parsley is biennial (in theory, in practice, it often doesn't produce much leafy material before going to seed in its second year). You can probably squeeze them all together in a pot this year, but they won't really have enough room to develop properly.

Coriander becomes a large, straggling and untidy plant very quickly. If you must grow it, put it in a separate pot that can be easily moved out of sight if necessary.

As Bamboo says, sage is a sub-shrub and will get pretty large. If you plant it with the other herbs, it will eclipse them as it too is very fast growing. And it will grow even larger next year. It's best put in a pot on its own unless your container is very large.

In my experience, slugs and snails are no threat at all to thyme and sage, but may sometimes have a nibble at dill and parsley. I've never found it to be a major problem, though, so I don't think it's anything you need worry about.

I had sage in a bed and it squashed all else. Repotted on its own in a corner its 4ft wide & 2 ft high.
The coriander is droopy so i never know if it needs more or less water.
I have herbs in the front & really in full sun soil is never an issue. Golden marjoram grows like the clappers.
That's why I wanted to stick these in 1 pot
Cheers

Marjoram - agree, can't give roots away fast enough...but the bees love it.