There is an easy way to get this if you missed it during the battle (like I did)
1) Fast travel to the Forge Tower in Cab-Gwanath (NE corner of the map)
2)Look to your right, you should see a Graug, if not, fast travel again and one should spawn, shadow mount it of course
3) look towards the Forge Tower, you should see one or two Caragaths, shadow mount one or both
4) And
THIS is why this is the best place to get this!! There are
THREE Ghul mounds here in this area, West, East and South of the Forge Tower!!!
5) Activate the Eastern mound to release the Ghuls and to keep your Graug and Caragaths busy.......
6) Run to the Southern mound and activate it, build up your combo and use the flash brand (
+
)
This is a lot easier if you have the 5 hits to get a finisher and the 2 finishers at once skills unlocked.....(Blade Master and Double Charge)
I tried getting a Spitter Ghul but failed, (darn Graug and Caragaths kept killing the Spitters) ran to the Ghul Mound South of the tower and left the Graug and Caragaths deal with the remaining Ghuls that came from the Eastern mound so I could have all the Ghuls in this mound to myself, tried again with the branding, and the cheevo popped!!!
Please leave a comment if this didn't help, or if I could explain something better.....