It depends on whether u can survive with a decent k/d or not in pvp. Thorn can be a pain if u struggle with staying alive and/or if u don't have void weapons. Pocket infinity is only a pain if u can't manage to get 10 rare or better fusion rifles. Bad juju is just time consuming. Invective and super good advice are the easiest and what I always choose if available for a quick and easy exotic shard