not sure if anyone had OEM implement with HA but I am planning to design one for my company but not sure about one component OMS, below is what I have for my OEM architecture:

OEM repository is running on RAC and I have to web servers which will running OMS on there as well; however they are not RAC for web server (the run independently). Each web server will manage the dabase via management Agent independently, let's say web server A manage server from database server 1-5 and web server B manage server database server 6-10. the question is I have is
1. what if web server A goes down?
2. can you point database server 1-5 to web server B?

Anyone inputs?