business function activation

Hi All

We have EP 7.0 and ECC 6.0

and ESS & MSS 1.3 Ehp3

For this what are the Business Fuction we need to activate in ECC 6.0

is the following Business fuctions are sufficient

HCM_ERC_CI_1

HCM_ERC_SES_1

HCM_ESS_CE

HCM_ESS_CI_1

HCM_MSS_ERC_CI_1

HCM_TM_ANALYTICS_1

Pls guide me

Thanks & Regards

Karthi D.