Instead of fighting EEP and trying to proc /ja on all of them (which I guess is probably what you're doing), fight the higher level mobs and go for weaponskill procs, or just don't worry about procs at all. I do dynamis as a trio and we fight the higher level mobs and get ~100 xp per kill. Use an exp bonus ring, kill quickly, and finish your trial. Farm coins later when you don't have to fulltime a certain piece of gear.