From what I am getting, I can tell you I'm getting 180% each hour, about 10% each run, runs take about 3 mins. Doing expert runs, the Exp is far more superior, probably 3x -2x better than WC if you have a party that can reach up to lvl 200 monsters. Especially at my lvl thats some pretty good exp. My other friend is getting about 290% exp per hour so... the exp from coliseum grinding can be great if you can get a good party.
Coli Grinding is pretty good if you get a party of high dps killers and make it far enough to get "godly exp rates". Example: Party I grind with has a 2 lvl 194 bladers, which is more than good enough. I probably wouldn't start expert grinding till you can get a good enough party around lvl 160~
Aequoriai / Abstruse / 2xe / Incandecent
Strider 195(142)/RW 14x/Duel 14x(14x/Elemental Master 14x