Board Thread:Game Discussion/@comment-16870461-20130917014211/@comment-13248161-20130917124341

Half Grimlock with signature weapon final stats = 69501 ATK / 85458 HP / 3504 DEF (!). Good attack, good health, very poor defense.

For comparison, MTM Slug before weapon bonus = 42433 ATK / 47232 HP / 4749 DEF. I've got him paired with Windcharger's weapon at the moment for final numbers of 55587 / 63763 / 8073.

MEM Thundercracker with signature weapon = 68086 ATK / 93982 HP / 9692 DEF.

So it depends on how much you value defense. Half Grimlock has a lot of HP but will bleed it out pretty fast.