To get the most out of RuneScape gold your Slayer journey,aim for tasks that allow for multi-target combat using Ice Burst,Ice Barrage,or a Dwarf Multicannon. Tasks that fall into this category include:
Dust Devils: Can be extended and barraged in the Catacombs for fast XP and solid drops.
Nechryaels: Also great for multi-targeting with Ice spells,and have very profitable loot tables.
Smoke Devils: Can be burst with magic and are less crowded.
Bloodvelds (Mutated): Good for cannoning in multi-combat areas.
These tasks not only give great XP but also tend to pay for themselves through valuable alchables and rune drops. Make use of task extensions from your Slayer Master to maximize your time on these profitable,high-XP creatures.
Final Thoughts
Slayer is a long grind,but it doesn't have to be a painful one. By managing your block list wisely,you can avoid the most frustrating,slow,and unprofitable tasks and focus on those that make the grind more enjoyable and efficient. If you're serious about reaching 99,you need to treat your block list as a vital tool,not an afterthought.
Above all,remember: this is your journey. Efficiency matters,but so does fun. If a particular task drives you crazy,even if it's not meta to block it,do it anyway. After all,burning out is the fastest way to buy OSRS GP stop making progress entirely.