Depending on your strength level you may want to do 1 claw spec then switch to gmaul for 2 quick hits on that. Use a max hit calc to find out which one deals the most damage for you precisely. At lower strength levels 2 claw specs do, but dclaw spec-2 quick gmaul hits causes more damage at higher strength levels.
Thanks for all the replies, but there's something about the g-maul I love. I think it's the super quick spec-ko speed. D-claws are sometimes too slow and people eat out your attacks.
Maul is best imo, its possible to 1 hit anyone with gmaul with 470-470-470+300ice rush damage. It might not be accurate but it has the potential to hit massive damage. I myself have hit 520-520-0 during a slayer task