I wouldn't go so far as to own but it can be a very strong team. I ran a 4 recovery card team in tier two arena and won most battles 4/5 or 5/5. There are better cards though ( a lot of the 7* ) and more people are aware of what cards do well in arena so it may not be as strong a team now.
The warrior queen an high priestess are only 18 and 20 cp respectively so not unfeasible to have one of each in a team. These cards are two of the best arena 7* cards. I also know that the cards with completely recover hp skill are good arena cards. I have a feeling at 6* they beat the high recovery types.