I noticed that a few very important creatures for Rhys are missing: Seedborn Muse is a must in Rhys as she allows you to use his ability every turn! Hornet Queen is nice because she gives you flying deathtouch tokens that you can double. Here's a big one: Nacatl War-Pride. When this creature attacks it puts in a token copy of itself for each creature defending player controls, then those tokens go away at end of turn, BUT with Rhys if you double your tokens as soon as Nacatl attacks, the tokens from Rhys will stay permanently, is exponential! Also Oracle of Mul Daya is probably the best ramp ever.
You can check you my Rhys list which as been revamped several times over the last few years: