+1
Hair-pulling
+5
Double handed hair-pulling
-2
Commenting on the size of opponent's boyfriend's penis
+10
Citing your sources
-200

Not using MLA format :(

+2
Scratching

-Eleventy Billion
Any variety of hand-flapping
+20
Boob punching
+5
Creative use of liquids
+15
Temporary blindness
-20
Permanent blindness
+1
Semi-permanent blindness
-25
Requesting backup
+50
Requesting backup DANCERS
-10
Use of the word "biatch"
+5
Use of the word "queef-demon"
+100
Use of the word "supercilious"

And if you enjoy girls fighting each other (who am I kidding, of course you do), check the Catfight Tag.