https://www.youtube.com/watch?v=DoovPge1Rq4 Sorry I did not have power in the keyboard battery so all I could do was copy and paste.
basically the link is for the masters brush cleaner and restorer, even the small pot will last for years and keeps brushes in good condition. The brushes I have from the army painter are the psycho, which is a completely insanely small pointed brush but I have not used this yet, I have not painted anything tiny enough. I have also got the small and large dry brush, which work well. I would, however, get some cheaper flat brushes for when you need to do really rough dry brushing saves abuse on the more expensive ones. You might want a highlighter and fine detail brush. I have got the monster for painting larger things, you may even want the terrain/.vehicle one for terrain painting or otherwise large surface areas but whether you need this one or not, only you can say.