Hellhounds exemplify why single‑target creatures are poor choices for RuneScape gold players chasing brisk experience. You can't barrage them in multi‑combat,and you can't deploy a cannon in their lair beneath Taverley unless you tolerate constant interruption from aggressive players and Hellhound spawns. Yes,Cerberus can drop a Primordial,Eternal,or Pegasian crystal worth a fortune,but regular Hellhounds drop nothing but bones,occasional clue scrolls,and the exceedingly rare Smouldering Stone. In practice,you pay for potions,food,and maybe cannonballs while gaining experience at a crawl. Their task weight is high,meaning Duradel loves assigning them. Blocking them frees a slot for monsters you can barrage,burst,or cannon in clusters,multiplying hourly gains.

CAVE KRAKENS
Kraken tasks are another frequent role that slows training to a crawl. The boss variant can be entertaining and offers the Trident of the Seas and the Kraken tentacle— items mid‑level Iron accounts crave— yet the ordinary Cave Kraken demands single‑target Magic. Melee and Ranged are off the table,and their defensive stats are high enough that even a charged Trident takes time to down each one. For main accounts,the modest drop table rarely offsets runes and supplies. Because of their high task weigh,t these sluggish assignments show up far too often; block them and watch your average XP per hour rise immediately.

BLACK DRAGONS
At first glance,Black Dragons seem harmless: Duradel asks for only 10–20 kills,the Dragon bones fetch a solid price,and adolescent nostalgia for Elvarg might tempt you to keep them. In practice,they are an expensive detour. Unless you own a Dragon Hunter Lance or Bow— both premium‑priced toys you will rarely wield elsewhere— kills proceed slowly. Trips shorten if you sip extended super antifires,but those potions aren't cheap either. The real cost is opportunity: while you trek back and forth between a bank and the Taverley Dungeon,a peer could clear hundreds of Dust Devils or Nechryaels in a multi‑area,pocketing far more Slayer and combat experience and earning similar or better loot. Leave Black Dragons to OSRS GP for sale achievement hunters or clue enthusiasts; block them and move on.