Ive done a ton of research and experiences with DCs with EE. It does seem that opening a little too many applications (google chrome, itunes, internet explorer). Especially the internet running in the background, which lots of these things messes with Java. I notice that when I happen to browse through things ie, tumblr, facebook and such minutes when I tab back or maximize the screen for the game, I DC.
The game as of now doesnt like tolerating with other applications and likes to prioritize itself over all.
Try using less applications and something that isnt heavy where it will kick you is what I learned. Graphics in game can be a cause too. Go to Aven with about 70+ players on some settings causes it to lag, and when moving still forcing yourself to move to certain area with that lag will also DC you.