In the very least though, it can be indubitably said that its an abuse of the sparring arena framework if melee classes like DR are running with a Ranged Rogue buff to get an undue advantage.
If a "skillset check" is implemented so that the sparring arena can limit the choice of a Ranged Rogue buff only to players with Archery skillset in their build (Primeval, Ebonsong, Stone Arrow, Druid, Ranger, etc.), then I think it'll resolve this abuse issue with minimal changes. No need to tamper with the Ranged Rogue buffs while still putting an end to the abuse.