After the verb ''consist'' you use ''of''. It is a phrasal verb ''consist of something'' (made of something).
Synonyms are comprise / compose. They all mean the same but comprise / compose are more formal.
For example: The diet consists of fruit and seeds. (only the active form of consist of)
The USA comprises 50 states. (active form)
The course is comprised of lectures and seminars. (passive form)
Muscle is composed of different types of protein. (only the passive form ''be composed of'' - formal)
Now, after the verb ''combine'' you can use ''with'' not ''of''. It means to join something together to make a single thing or group. The verb can be both transitive and intransitive.
For example: He managed to combine family life and/with a career.
The two countries combined against their common enemy.
They have decided to combine the two departments.
''combined'' is an adjective and it only goes before a noun.
e.g. combined company
I hope this helps :)