Since you want to use the soil moisture sensor in your particular situation, I would just depend on it, since when it rains it will be activated when the rain has provided enough moisture. You don't need the rain sensor. Aquamatics comment also must be taken into account though, if you have anything more than a simple zone to monitor. If you have lots of zone then you need lots of moisture sensors and needs to be somehow tied to the specific zone valve. A single sensor input on a multizone contr...
