if mobs are dieing too fast, use your instant cast spells and cast it on as many mobs as possible its super easy. also arc and whm can both Cross Class blizard 2(which is realtivly a low level) making it extremely easy always for arc and cnj to get xp from fates all you have to do is just cast blizzard 2 a couple of times and you will get a gold. These high lvl parties also take low level's just ask them for a spot, or look in pf; tell them you are having issues getting above bronze and you will be flooded with a million different ways to tag mobs for your class/job. but really the only class at a disadvantage in low level fates is thm/blm since it's the only class that can't use blizzard 2 when synced.