Diodimus
Dalayan Elder
gave you juggo stats. charms are dependent on player grind not tier as w/ deity aug and AAs can be grinded w/ time. But the actual gear is what needs considered. Also, while wis and cha are nice, they are secondary stats and as per the edit, which is in your quote, im not discounting those stats.
Also the sum of the difference of the primary stats is 139 (-5-4+61+87). 139/5(tier difference) = 28. 28/20(number of gear slots excluding charm) = 1.4. So effectively each item gains 1.4 primary stats increase every tier.
I personally think that # should be 2 or slightly above. I think wish some minor work, an algorithm could be devised to measure if an items stats are fairly on tier. This would also have to factor the other stats, but yeah. Most items seem to just have stats thrown on them. which some designers have said b4 that for their items. there isn't much along the lines of guidance for stat progression.
I like this. However, we cannot completely disregard all secondary stats. And I know that I have some gear that is way above my tier as well as some that is below my tier. I don't know what kind of an effect this may have, but maybe we should consider two toons geared completely in gear from their current tier. This is of course entirely too much work for me to do unless I am really bored, so I will leave this up to the enterprising player or Dev who will make the final decision.