Located in RuneScape gold the God Wars Dungeon,Spiritual Creatures are not only tedious to kill but also frustrating to access. These monsters are constantly aggressive,and without the right God-Align gear,you will be bombarded by other monsters while trying to focus on your task.

The loot is terrible,and the task weight isn't high enough to justify spending time on them. If you're not specifically after Dragon Boots,these creatures are best left off your task list. Personally,these were The first creatures I blocked,and I've never regretted that decision.
6. Steel Dragons

Steel Dragons are another variant of the metal dragons that can slow you down significantly. They have high defense and hit hard,requiring you to use defensive prayers such as Protect from Melee and Piety. Their dragonfire attack also makes them more dangerous than other dragons.

Despite their long kill time and brutal attacks,Steel Dragons have a relatively small kill count,which means you'll need to return to the area multiple times for a single task. While Earth Spells can now be used for some efficiency with Project Rebalance,it's still a slow and painful task that doesn't provide much in terms of loot or XP.
7. Mithril Dragons (Don't Unlock)

Mithril Dragons should be avoided at all costs,and you shouldn't waste Slayer points to unlock them. They're incredibly slow to kill and offer terrible loot. The XP gain is minimal,and the time required to finish a task makes them a massive waste of resources. If you're looking for effective Slayer XP,these dragons should never be on your task list.
Monsters Worth Considering for Multi-Target

While blocking certain tasks is vital for XP optimization,it's also important to focus on tasks where you can maximize your efficiency. Monsters like Dust Devils and Nechryaels are excellent choices,as they can be multi-targeted with Ice Spells and have a decent loot table. With the option to extend tasks via Slayer Masters,these tasks can be prolonged while still offering great XP and covering the cost of spells used.
Conclusion

Slayer in OSRS is a long grind,but by effectively using your Block List,you can save a lot of time and frustration. Block single-target,high-weight monsters with poor loot tables,and focus on multi-target tasks that maximize your XP per hour. While Slayer isn't something that can be rushed,these small optimizations can make the journey to OSRS GP for sale 99 more bearable and,ultimately,more rewarding.