Barda would make Diana work for each and every win.
1.http://img57.exs.cx/my.php?loc=img57&image=MM6-1.jpg
2.http://img68.exs.cx/my.php?loc=img68&image=MM6-2.jpg
3.http://img68.exs.cx/my.php?loc=img68&image=MM6-3.jpg
4.http://img54.exs.cx/my.php?loc=img54&image=MM6-4.jpg
5.http://img54.exs.cx/my.php?loc=img54&image=MM6-5.jpg
6.http://img54.exs.cx/my.php?loc=img54&image=MM6-6.jpg
7.http://img54.exs.cx/my.php?loc=img54&image=MM6-7.jpg
8.http://img59.exs.cx/my.php?loc=img59&image=MM6-8.jpg
And it's not like they would pick each other to fight every time. Diana, when bloodlusted, is probably the most level headed and would probably pick to fight Thor more often than not.