Reg G Kyogre Team ?

I'm currently trying to put together a Kyogre rain team but I'm finding it difficult to know what to put on it, can anyone help me with this?

The Kyogre set im using is a bulky calm mind one, so I think Rillaboom works well with it due to fake out and passive healing from grassy terrain, but aside from that I'm pretty lost. Any help would be appreciated :)