Keep dodge no higher than 10.518%
As to reforging dodge/parry...
Sometimes you will want to. The best gear has dodge/parry and mastery already on it. That gear you reforge to get the best balance of dodge and parry. ie if you have too much dodge reforge dodge->parry.
More often, the gear will have say dodge and hit. In most cases there you will reforge hit-> mastery. However, sometimes the stats aren't balanced and you have say 220 dodge and 110 hit. In a case like that, often reforging dodge -> mastery will yield more overall combat table coverage.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng