Total damage. Somewhere I have screenshots from when I tested this quite a while back and proved it to be true.
Ah, there it is.
http://radiationnow.net/wow/aggression_proof.jpg
Important things to note here:
Vis'kag.
Kick at 76 shows that Rabbit's armor is minimal.
847 AP.
Level 60.
Viskag damage range: 100-187. Max is 187.
((187 + 847/14*2.4) + 68) = 400.2
So, with no Aggression, assuming zero armor, max hit is 400.
With Aggression, it could be either:
((187 + 847/14*2.4) + 68*1.06) = 404.28
or
((187 + 847/14*2.4) + 68)*1.06 = 424.21
Which one fits my screenshot, especially knowing Brer Rabbit has some armor?