Main problems i see for sp grind parties is two fold. while the recruitment system while theoretical superior it is not practically superior to the old flag up and look method. both could exist and i think it would work well. Second, the re-spawn on worth while mobs is total garbage. I know a bunch of places where its possible to get 4-500 sp per mob while grouped. you just have to stand around like a bunch of idiots after you blow through them and that is not what i would qualify as good sp/h.