RSorder OSRS: Although Mithril Dragons are unlocked through Slayer tasks

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Both Greater and Black Demons are high-weight tasks with disappointing loot tables. Duradel often assigns large quantities of these demons (up to 200),which means a lot of time spent fighting slow,single-target monsters with very little in return. On top of this,finding a world without competition can be a hassle,and the spawn rates aren't always ideal. Ironman players may consider keeping these tasks since they drop items needed for RuneScape gold Slayer Helm upgrades or Emberlight,but for most players,these demons aren't worth the time and effort.
Spiritual Creatures

Spiritual Creatures found in the God Wars Dungeon (GWD) are notoriously annoying to deal with. These monsters have low Slayer task weights but are widely considered some of the most tedious to kill in the game. They require a significant amount of preparation,as you'll need specific God-aligned gear to avoid constant aggression from other GWD monsters. Their loot table is also poor,so the task isn't worth the hassle unless you're specifically after a pair of Dragon Boots. For me,these creatures were the first I blocked,and I've never regretted that decision.
teel Dragons

Steel Dragons,like Black Dragons,are high-defence,high-Hitpoint monsters that can be tedious to kill. Their primary attacks include a strong dragonfire breath and powerful melee attacks,so you'll need to bring protection prayers like Protect from Melee and Piety to maximize your efficiency. Although the introduction of Project Rebalance has made Steel Dragons weak to Earth Spells,they remain a slow kill,and their loot table isn't very rewarding. Steel Dragons often come in small task sizes,and even with Earth Spells,these tasks can take far longer than preferred. Given their high difficulty and low reward,Steel Dragons are a prime candidate for blocking.
Mithril Dragons

Although Mithril Dragons are unlocked through Slayer tasks and offer good experience for higher-level players,their slow kills and low drop rates make them inefficient. They have a high defence level,making them challenging to kill without using powerful weapons and high-level prayers. Given their lack of good drops and high task weights,they don't fit well into an optimized Slayer strategy.
Conclusion

When you're grinding towards 99 Slayer,your primary focus should always be maximizing XP efficiency while keeping the grind as enjoyable as possible. While it's tempting to always aim for the most efficient tasks,don't forget to prioritize fun. Some tasks might not be as rewarding in terms of XP,but they can offer a break from the more intense grinding.

By blocking the right monsters and selecting the most efficient tasks,you'll be able to speed up your Slayer journey. The tasks listed above—Hellhounds,Cave Krakens,Black Dragons,Greater Demons,Spiritual Creatures,Steel Dragons,and Mithril Dragons—are prime candidates for blocking if you want to focus on high-XP tasks with better drops.

Ultimately,the Slayer grind is a marathon,not a sprint,and managing your Block List effectively is one of the keys to success.

Achieving 99 Slayer in Old School RuneScape (OSRS) is a journey that requires patience,perseverance,and a lot of time. For those who have reached the coveted 13,034,431 XP in the Slayer skill,the importance of optimizing tasks using the Block List becomes abundantly clear. After all,hitting 99 Slayer is not something most players grind out in a few days; it's an achievement earned over a long period,usually as you train your combat skills through regular Slayer tasks.

Since Slayer is an auxiliary skill,it's generally something that complements your combat training rather than being the sole focus. Because of this,players often prefer to make the grind more bearable by avoiding certain monsters. This is where the Block List becomes essential. By spending 100 Slayer reward points,you can block a task,and over time,this can really help in OSRS gold for sale optimizing the XP gains. For players striving to make the most of their Slayer experience,this guide will identify monsters that are better blocked,to keep the grind as smooth and efficient as possible.