The best high availability solution for App Manager & Op Manager themselves

The best high availability solution for App Manager & Op Manager themselves

Hi guys. Could any one please let me know that, what is the best high availability solution for App Manager & Op Manager themselves. First of all, it is so important for me to make a high available monitoring for our company, and when one App or Op Manager monitoring goes down, the other one could work instead of it.
 
Thanks in advanced.