I think it's fair enough to allow even the lower levels to open up their own raid. killing it takes skill and brain. you need to communicate, keep in touch and make friend. if not on the other hand, can level fast. so it's good if can kill but better if they realized they can't kill their own boss. still there's a chance they can join someone else raid. it's choice. however I think since it's already going by 4 locations at a time raid we might get on Return to Paris Istanbul Seoul Antarctica may be very rare and will be the real deal. so then only the higher ones will get and hopefully, they will not forget 1st tiers. in different words, lower tiers might get ages to reach that unless paid the way up. so similar situation like if they are not given a raid. so their only chances might be these raids, unless they make friends with the top. Or 1st tier should join recognized syndicates. they will not abandon any member of the family. and plenty of raids sharing and 90% of them get killed in 1-2 days.