depends on what you mean by softcore.
if you are still going for high-end raid, both classes are not desired, with rdm being slightly more wanted than blm. the only wanted caster class is smn. blm is a stationary turret. it does top tier dps, both aoe and single target. it excels at casual content, but sucks at high-end raid. however, u can clear any hard-core content with this class and probably still do better dps than rdm. its just that it is impossible to find a party because the class offers no party utility. rdm is mobile caster and has some party utilities, like heal and res. dps is the lowest of all dps classes tho. in the end, its which class you enjoy the most that matters. if you want to get into groups, play smn, but there are times when blm are more wanted than smn and vice versa. it all depends on the patch. caster classes are never the meta. the only meta dps class is ninja.