| Nuclearsunburn |
I was coming up with 6d6.
1d8 (medium, light) > 2d6 (large) > 3d6 > 4d6(gargantuan) > 6d6 (gargantuan + lead blades)
to do this you would HAVE to be enlarged or a gargantuan aklys would be unwieldable.
Titan Mauler, I'm not sure what you're trying to do there. Decreased attack penalties is all you'll get for using a Gargantuan aklys. (If you are Large size being a Titan Mauler will let you use a Large 2H sword 1 handed. It won't let you use weapons sized inappropriately for you in one hand. So any class can do this if they're enlarged)
That's my understanding of it anyways!