I did a Diable run some time ago. Yes, basically, I was using about 8-10 Rime(F) with S-Modded Cargo and Fuel hullmods - it's the best Diable can get if you're sticking to faction-only. Makes sense - they are an aggressive raiding faction, not traders, and they are close to core, so they don't need that much range to haul spoils back. Extensive exploration is hard to do with their ships - you need gate network, or set up some pitstops to refuel/store stuff temporarily (Outposts feature from Nexerelin is helpful here). Or grab a Prom/Atlas instead if you don't mind using non-faction ships.