Best Mid Game Bosses in OSRS (2026)

If you've already moved past beginner bosses and your next goal is building a 100M+ GP bank, you're entering what many players consider the most rewarding stage of Old School RuneScape: the MID GAME.

This is where bossing truly starts to pay off. Fights become more mechanically engaging, unique drops are worth chasing, and for the first time, endgame gear stops feeling like a distant dream. Whether you're saving for a Twisted Bow, Tumeken's Shadow, or simply upgrading your account one piece at a time, these bosses offer some of the best GP and progression in the game.

In this guide, we'll rank the best mid game bosses in OSRS, starting with beginner-friendly encounters and working all the way up to bosses capable of generating 9M+ GP per hour. Along the way, you'll also learn the mechanics and combat skills that will prepare you for Old School RuneScape's true endgame.

Not every boss is meant for maxed accounts or players with billions to spend on gear. Mid game bosses are the sweet spot where the difficulty starts ramping up, the loot becomes genuinely valuable, and every upgrade feels meaningful.

Most mid game bosses share several key traits:

If your goal is to build a strong cash stack without relying entirely on Slayer or AFK money makers, these are the bosses you should prioritize.

If you're just getting into serious PvM, Perilous Moons is arguably the best place to start.

Unlocked after completing the Perilous Moons quest, this activity is located beneath Cam Torum in Varlamore and is designed for players with around 75 Combat.

One of the biggest advantages is how forgiving the encounter is. You'll fight three different bosses, one at a time, with the ability to fully restock between fights without ever leaving the dungeon. That makes learning mechanics much less punishing compared to most other bosses.

Around 2M GP per hour

The biggest rewards are the three Moon armor sets:

All three sets require only 50 Defence, making them excellent mid game gear and a solid stepping stone before investing in upgrades like Bandos equipment.

The Royal Titans were practically designed to teach one of the most important PvM skills in OSRS:

Gear switching.

During the fight you'll face:

The mechanics are straightforward but effective. Whenever a Titan moves away, you'll swap to Ranged. As soon as it closes the distance, you'll switch back to Melee.

The encounter can be completed:

Making it one of the best bosses to learn alongside a friend.

Around 2M GP per hour

Besides the GP, Royal Titans is excellent practice for more advanced PvM where fast gear switches become second nature.

Want to gear up to face the new Maggot King boss easily and safely? Check out our CATALOG.

If you've never tried group bossing before, Hueycoatl is one of the easiest places to start.

This massive serpent can be found in Varlamore and only requires completing the short quest Children of the Sun.

One of its biggest strengths is its flexibility. You can fight it:

That makes it accessible whether you're learning with friends or joining public masses.

Hueycoatl introduces several mechanics that become common in later PvM encounters:

Around 2.2M GP per hour

Some of the most desirable rewards include:

If you're looking to get comfortable with coordinated PvM before tackling more demanding group content, Hueycoatl is one of the best stepping stones available.

If you're looking for a boss that prints GP consistently, Vorkath is hard to beat. Unlike many bosses where most of your profits depend on landing a jackpot unique, Vorkath delivers steady income almost every trip.

You'll unlock this boss after completing:

What makes Vorkath stand out is that a huge portion of your profit comes from its regular loot rather than rare drops. Even if your RNG isn't cooperating, you'll still walk away with solid GP thanks to:

This makes Vorkath one of the most reliable money makers in the entire mid game.

Around 4M GP per hour

Once you master the mechanics, kills become incredibly smooth and consistent. The biggest factor in maximizing your profit isn't luck it's reducing downtime between kills and banking efficiently.

For years, Zulrah has remained one of the most iconic money-making bosses in OSRS. It's also one of the toughest bosses for newer players to learn because of its multiple rotations.

To access Zulrah, you'll need to complete:

The fight revolves entirely around memorizing attack patterns and positioning correctly during each phase. At first, it can feel overwhelming, but once the rotations become muscle memory, Zulrah turns into one of the smoothest and most profitable bosses you can farm.

Beyond the GP, Zulrah is fantastic for improving core PvM skills like:

Those skills transfer directly into many late-game PvM encounters.

Many players consider the Corrupted Gauntlet the fairest PvM challenge in Old School RuneScape, and honestly, it's also one of the bosses that took me the longest to master.

The reason is simple: everyone starts on equal footing.

Every run begins with absolutely nothing, forcing you to:

There's no expensive gear to carry you here. Success comes down almost entirely to your mechanics, decision-making, and execution.

To unlock the Gauntlet, you'll need to complete:

If you're new to the content, start with the Normal Gauntlet before jumping into the Corrupted version unless you're okay with pulling your hair out while learning.

Up to 4.7M GP per hour

The Corrupted Gauntlet is one of the best ways to build wealth if your stats are strong but your bank isn't. Since every run provides its own gear, you don't need expensive equipment to earn excellent GP.

If you're looking for one of the toughest Slayer encounters before reaching true endgame PvM, Araxxor should be at the top of your list.

This boss is widely considered the strongest Slayer boss in the game right now and serves as an excellent stepping stone into high-level PvM.

One of the most important things to know is that Araxxor is weak to Crush weapons, so bringing the right setup will have a huge impact on both your kill speed and overall profit.

Around 5.3M GP/hr

These are some of the most valuable unique drops available for advanced mid game players, making Araxxor well worth learning once you unlock it.

If you prefer solo PvM, Phantom Muspah is easily one of the best bosses to grind once you're ready to move beyond Vorkath and Zulrah.

You'll unlock the fight after completing:

The encounter constantly switches between different combat styles, forcing you to adapt on the fly. Throughout the fight you'll deal with:

Learning how to react to each phase quickly is what separates consistent kills from frustrating deaths, making Muspah an excellent boss for improving your PvM fundamentals.

Around 6M GP/hr

Your primary goal is collecting five Venator Shards, which can be combined into the highly sought-after:

Even outside of unique drops, Muspah offers consistently strong loot, making it one of the best solo money makers in the mid game.

Completing Desert Treasure II unlocks four of the best money-making bosses in Old School RuneScape. Each encounter introduces unique mechanics and rewards players who master increasingly difficult PvM challenges.

If your goal is to transition into endgame content, this is where the real grind begins.

Every one of these bosses pushes your mechanics further than traditional mid game PvM. By the time you're consistently farming all four, you'll have developed the skills needed for raids and virtually every endgame challenge OSRS has to offer.

Besides offering some of the highest GP rates in the game, these bosses teach skills you'll use throughout endgame PvM, including:

Mastering the Desert Treasure II bosses is more than just a money-making milestone it's the point where most players officially transition from the mid game into Old School RuneScape's true endgame.