i have a request to add this both(servicing stack update) into wsus offline.
support.microsoft.com/kb/2871777
x86: download.microsoft.com/download/7/7/6/7764A15B-F6FC-4818-A3C7-BD3448AB89FE/Windows8-RT-KB2871777-x86.msu
x64: download.microsoft.com/download/F/C/D/FCD3C9E0-ED7C-40B4-9A5E-B5E5AC572361/Windows8-RT-KB2871777-x64.msu
server: download.microsoft.com/download/9/6/9/96990B5A-D539-40A9-AC2C-111DD01001B0/Windows8-RT-KB2871777-x64.msu
support.microsoft.com/kb/2821895
x86: download.microsoft.com/download/B/8/6/B8606F0F-9C7E-436E-A49F-A2F0FF241551/Windows8-RT-KB2821895-x86.msu
x64: download.microsoft.com/download/0/3/5/03531688-75E5-40C4-A34A-F5B095D2463B/Windows8-RT-KB2821895-x64.msu