I love the buttery taste of guayusa. For me, it's effects are similar to coffee without as many jitters and the light euphoric peak lasts a little bit longer. Considering what I think I understand about safrole not being water soluble, consider drinking the tea unstrained to get all the effects from ingesting the plant parts with the water.
For some "open" dreaming effects, try a cup of tea from white sage (salvia apiana) an hour before bed. 2g/8oz is a good starting point. It tastes like spicy sap.
I have been having a cup of tea from white sage, peppermint, and ginkgo to cope with a cold and discovered the dreaming effects by chance. Ginkgo normally keeps me up, but the sage allows me to ease into sleep.