Usually not many spices are added in this type of preparation. By exotic I would say - Darjeeling varieties. This mixture is then brought to a boil. Strain the tea directly into tea cups. Basically, you depend on the spices to give you the flavor.
Spices There are a lot of varieties which are used.
Combinations are made usually depending on the taste the individual likes. I can give you certain other names - but I know only the Indian names. Don't know the English equivalent. If you are interested you could email me for an extended list. I'll try and find the English name equivalents.