SEP and SEPM Migration Suggestion

Hi All,

I have some questions about recommendation on our architecture. Currently i have SEPM 12.1 ru1 mp1, SEP 12.1.2 RU1 MP1 client and some SEP 11 clients. Now we will have some windows 8 client which is only supported by SEP 12.1.2 RU2. I also have GUPs and LUAs running on SEP 12.1 RU1MP1. Now, what should i upgrade to 12.1.2 ru2? what can be remain as is?

Regards,