Thanks for pointing this out
did some testing on theramore dummies (pretty sure they have no mitigation) and it does seem that slam damage is normalised and uses this formula instead of the damage listed in the character page
(wepdmg+(3.3*(AP/14))*1.25
(wepdmg being taken straight from the weapon)
I also ticketed a gm to see if I could get any clarification on how it works - we will see how that turns out
ran the slam numbers again using this:
full stre: 874
balanced: 894
full crit: 892
maximum I was able to achieve within the limitations of spell cap was with 18.7 crit and 260 ap which gave 896 (this build
Level 20 Human Warrior | WoW World of Warcraft Armory Profiles | Masked Armory)
again due to the assumptions made in calculating the benefits of enrage these numbers are slightly bias towards crit, but with these numbers you should gear more towards crit than a balance of crit and stre
stre still isn't completely useless however and you shouldn't gimp yourself trying to max crit