I think the idea on paper is dex is supposed to help casters land hits and live by helping them do better against mele attacks. However the dex really dosent help much (except a bit on mobs with howling wind) and in the majority of cases is nearly useless compared to vit or focus instead.I don't play endgame Mage or Druid yet but I do see a lot of gear has dex on it. Does dex make much differance to casters skill hits?
For example the spiritseed and shrive sets improve your skills roughly the same. However the lack of vit for dex is a horrible trade off.