Like Gawain said depends on what second class you pick. If you pick warfare as per HCL's suggestion the melee option is a good one. Me personally, I would recommend going down the onslaught tree rather than the Dream alternative just because the average damage output is higher, otherwise there is plenty of possibility. I have both a Dream/Warfare character (63rd) and Dream/Spirit mage (53rd) who are both successful in their own right.
All I recommend is have fun and sometimes thinking outside the square can actually make the game more challenging and more fun so I would recommend experimenting rather than going for a "cookie cutter" build.
Maybe a pure Dream or if you go Dream and Warfare try not to go melee and try a combination of the horn stun plus Sleep plus Distortion attacks maybe?...
