Hit rate>Agil>AP>Crit if your combat swords once you reach hit rate cap then go gor other stats. Doesn,t matter how hard you can hit a mob if you miss. Needs are change for diff specs or pve/pvp ( pvp stam is imp)
You should always use the following gems to fill a socket. ( once again, until you reach hit rate cap)
Red Socket- Use a +hit/+agil
Yellow Socket- Use a +hit gem
Blue Socket- Use a +agil/+stam
Meta- relentless earthstorm