I like this. However I think you have got your maths wrong for the 'True power of the hammer' section. Anyone please correct me if Im wrong, but here-

Damage

Base damage=26, smith to legendary +10=36 (as smithing is applied first)

36*2.5 (for 100 two handed plus perks) = 90

90*2.6 (as fortify two handed magnitude is 40, meaning 4 is 160) = 234 for a normal unenchanted attack, so 478 for critical charge.

Enchantment

25*1.25 (for enchanting perks) = 31.25

31.25*1.12 (for frost and stalhrim) =39

39*2 (for poison) =78

Therefore-

A charge with a poisoned weapon is 478+39 +517 (as poison does not boost the enchantment damage on the first swing)

Any subsequent hits are 234+78 =312

So the warhammer does a lot more damage than you thought.

Also the augmented perks in the destruction tree can boost your frost damage (and the secondary enchantnment) by 50% for 3 perks, and can be reached by training, bringing enchantment damage to 58.5 and 117 for without and with poison respectively, bringing the total damage to 536 for a great critical charge, and 351 for each hit afterwards.

Anyway I hope I am right and helped, and again good build

I like this. However I think you have got your maths wrong for the 'True power of the hammer' section. Anyone please correct me if Im wrong, but here-

Damage

Base damage=26, smith to legendary +10=36 (as smithing is applied first)

36*2.5 (for 100 two handed plus perks) = 90

90*2.6 (as fortify two handed magnitude is 40, meaning 4 is 160) = 234 for a normal unenchanted attack, so 478 for critical charge.

Enchantment

25*1.25 (for enchanting perks) = 31.25

31.25*1.12 (for frost and stalhrim) =39

39*2 (for poison) =78

Therefore-

A charge with a poisoned weapon is 478+39 +517 (as poison does not boost the enchantment damage on the first swing)

Any subsequent hits are 234+78 =312

So the warhammer does a lot more damage than you thought.

Also the augmented perks in the destruction tree can boost your frost damage (and the secondary enchantnment) by 50% for 3 perks, and can be reached by training, bringing enchantment damage to 58.5 and 117 for without and with poison respectively, bringing the total damage to 536 for a great critical charge, and 351 for each hit afterwards.

Anyway I hope I am right and helped, and again good build