the zodiac signs connection makes no sense. they are not zodiac signs

Nice one, and nothing wrong with the zodiac group. Couple of decent red herrings too,

The zodiac signs group is really interesting. It's not the names of the signs, rather the symbols which represent them.

I had a little trouble with the Summoner group though, not being English (I'm Danish), I had to rely a little on my English textbooks in the house!