List of possible d/c reasons:
To many skills / buffs, for me 3 skills and 4 buff is the limit for no d/c.
Doing any thing while potions are stacking like going to agent of port, grocer, through warp gate etc.
If you get d/c and get a message saying to close game and login again do it as it will keep d/c you until you close cabal and start again.
I dunno but if you keep on getting d/c just close cabal and bot programs and start them up again.