I tried some of your suggestions and now I can't go back--I'm addicted to cardamom! The cloves are *awfully* strong, so I've scaled way back & only add a few. Too much spice just overwhelms the tea and I don't like the flavor, so I've cut back on the fennel now I'm adding the cloves and cardamom.
And I picked up some cinnamon sticks so that's next on the docket!
It's fun experimenting, thanks again for your help!