Flight Crew Air Transport Pilot (ATP)
Conflict Airborne Conflict
Flight Crew Took Evasive Action
Airspace Structure; Procedure; Company Policy
Flight to PHX. Upon receiving our clearance in Airport ZZZ; we noticed that recently dispatch has been filing us at 10;000 feet between Airport ZZZ and PHX. The Captain and I believe this is an issue for the following reasons. 10;000 feet on the PINNG1 arrival brings you right through the VFR practice area and the VFR sky diving areas for E60 and P08 airports. In this specific instance; there were two [small transport aircraft] both at 12;500 feet dropping skydivers around the BRDEY intersection. I noticed the Aircraft on the TCAS and prepared for evasive action. Aircraft was instructed multiple times that we were coming from below; he decided to drop sky divers anyway and began to descend resulting in our Resolution Advisory (RA). I followed the RA and the Captain and I noticed 2 brightly colored skydivers within 1500 feet of our wingtip - to the point we could see the arms and legs of the divers. ZAB came over the radio and was sternly advising them not to drop but they did anyway and then descended VFR in our direction. This was just one of the RA's among the many TA's we got on this flight. The area in the vicinity of IWA; P08; and CGZ is an extremely dense training ground (designated by the Arizona Flight Training Work group) for multiple flight schools. Flying through this area at such a low altitude is extremely unsafe and should be avoided. Especially around two of the busiest skydiving airports in the United States. From now on; a discussion will be taken between the Captain (CA); dispatch; and myself about amending the altitude on these flights to a safer altitude - 14;000 - 16;000 feet above the GA conflicts. Both the CA and I agree flying 10;000 feet on this flight is an unnecessary risk which should be mitigated. 5 TA and 1 RA is too many for such a short flight. The altitude filed on these flights should be reconsidered.
Air carrier First Officer reported multiple TA's and RA's on the flight to PHX at 10;000 feet and suggests filing for a higher altitude on this route.