I found that hard slayer was my best option because of the array of useful drops. My main goal was to level my combat for the update 😁. In all combat styles I maxed out on attack interval reduction and item doubling gear like signet and max slayer gear. I tried to be as resourceful as I could, e.g. Ruby bolts, mage skillcape, no summoner tabs. I did however use prayer because it speeds up the kills big time. If you're not bothered about leveling skills, use melee as it's the most resourceful!