I have decided to take a different approach to blocking out the orc, this is done by applying a skin and subsurf modifier to a line (skeleton basically). I learnt this technique from YouTube and thought it would be handy for character sculpting. Here are some pics:
My thick Orc
The mentioned skeleton
This technique is also very good for rigging the character as you can turn the skeleton into a rig with little work. Here is the tutorial for how I did it: Fast Character Modeling with the Skin Modifier in Blender by Joey Carlino