Message to User:
Don't post incorrect information about stat rounding.
About wrist enchants, wouldn't 50 AP be actually the best option, or a very viable one?
Using Redcape's stat values 50 AP enchant vs 65 crit/haste, ap one beats slightly, and when considering Exemplar's weight the 50 AP just wins by a good margin (in terms of relative str we get).
Assuming I am looking at the stat weights right the 50AP enchant is just over twice as good as the 65Crit and greater still than the haste enchant.
If I remember correctly then the game doesn't count the decimal percentage on stats such as crit or haste so the crit/haste enchant could possibly pull ahead when the little extra they provide would push your stat over a whole number, such as increasing crit from 9.9% to 10.1%.