Docile brown with bantams?

I will shortly be left with just one docile 'gingernut ranger' hen (Rhode Island Red/Light Sussex) one year old with a trimmed beak (managed to rehome the terrible bully she shared her coop with).  I would like to get a couple of bantams to keep with her.  

I understand that some people do keep bantams with larger birds and some do not recommend it.   However, I was hoping that in my circumstances it would be ok because of my existing hen's good nature and her trimmed beak?

Obviously I will take introductions very slowly.  Any advice would be appreciated.

I personally feel that so long as you have lost of things for them to do and places to eat and drink there should be no problems. When I first put bantams in with my bully hens they did pick on them but once I had the right balance of feeders and drinkers and things to do they were and still are fine