QR is the best for EXP now in my opinion, but hey... I rarely play anything but QR, actually I haven't played any other modes but QR for a few month's now. Only QR.
I only played a few random times with my alt and if I wouldn't have spent the GP I would have had like 150k GP <<< In no time. And I wasn't even doing good with my alt because it dosen't have any speed gear or anything good.