I prefer to combine this with FixedRandomDelay=true. FixedRandomDelay ensures that the randomized delay is an arbitrary number up to RandomizedDelaySec, but it is deterministic per server and timer. I find this useful because this means the timer will always run at XX:12:45 on server01, always run on XX:06:23 on server02 and so on.

This combines very simple configuration, while being predictable and spreading out timers well.