According to my experiences, Quar doesn't give such hot exp.
Only thing that is even somewhat decent is Hired Guns Blood Money. .. if you can just grab all 80 gold or split 40/40 or 30/30/20 with your buddies, make other side spawn lots of npc's and farm kills.
If you score around 50k+ play points ...with 300% you might be 5k exp + with 200% it's 4.5k exp +
As of now, nexon is doing 100% exp on new map, Treasure ship, so see how that goes too!