Prayer Grinding for Ironman: The Reality of Getting to 99

Most people try to brute-force prayer through burying bones at home altars and quickly realize they're going to spend thousands of hours on nothing productive. The real method involves the Nethership. You need level 75 Prayer to access it, so everything before that point is just padding. There is no fast way around 1-75. Once you hit 75, you travel to the Dark Altar inside the Nethership. This is where your prayer levels actually climb. You use the Necromancer prayer book, equip Sacrificial bones, and stand at the altar cycling between burning the bone and sacrificing it. Each full cycle gives you roughly 30-40 XP depending on your setup. It sounds slow until you realize you are using one bone per action instead of burning through dozens. I hit this method hard back in 2016 when the Nethership was new. My first mistake was bringing standard bones. Standard bones give you almost nothing at 75 Prayer and you burn through your supply in about an hour. The Sacrificial bone is mandatory because the sacrifice bonus multiplies your XP per bone significantly. Without it you are wasting inventory space and time.

Here is what your bone supply needs look like. From 75 to 99 you need approximately 1.55 million XP. At the Dark Altar with Necromancer book active and Sacrificial bones, each action yields about 30 XP. That is roughly 51,000 bones total for the entire range. The Necromancer book gives you guaranteed spawns of skeletons, zombies, and ghosts inside the Nethership, and those drops alone will give you over 400 bones per trip. You will not run out if you plan your banking correctly.

Getting From 1 to 75

This is the tedious part. You use the Light Altar and burn normal bones. At lower levels each burn gives you 3 to 5 XP, which means you need roughly 65,000 burns to reach level 36. From 36 to 75 the XP per burn increases to around 12-15, requiring another 280,000 burns or so. Total investment is somewhere around 40 hours of active play depending on your reaction time and bank efficiency. Burying bones at home altars is technically an option here but it is slower per action and you cannot multi-task. Burning at the Light Altar lets you keep your mouse busy watching the animation finish while your mind drifts. It is not glamorous but it works. A counter-intuitive detail most guides miss: the Light Altar does not respect the Necromancer book bonus. The book only works inside the Nethership. So even though you might be tempted to bring it along from the start, it is useless until you physically step into the rift zone. Do not bother equipping it before level 75. Save your prayer book slot for something that actually works at low levels, like the Piety book if you are also training combat, or just stick with the default setup until you can use the Dark Altar.

Get the Full Details

[OSRS] 43 Prayer Guide - Getting bones & ironman prayer training (detailed, Step-by-step) : r ...
[OSRS] 43 Prayer Guide - Getting bones & ironman prayer training (detailed, Step-by-step) : r ...

Edge Case: The Cycle Break Problem

I ran into a specific issue where the Dark Altar cycle would occasionally break if you moved too far from the altar or logged out mid-action. The game cancels the sacrifice if your character moves more than a few tiles away after initiating it. My workaround was simple: I positioned my banking hotspot exactly three tiles from the altar, moved there only after the cycle completed, and never pressed W, A, S, or D during the animation window. It sounds obvious but you would be surprised how many people lose entire stacks of bones this way. Another thing nobody mentions is that the Nethership has ambient bone drops on the ground from killed monsters. You can pick these up and use them at the altar without them counting against your carried bone limit. I made a habit of sweeping the floor between cycles. It added maybe 20 extra bones per trip and reduced how often I had to return to bank.

Time and Bone Estimates Breakdown

Standard bones from general stores at the Grand Exchange are roughly 5 coins each in current market conditions. That makes the 1-75 phase cost around 300,000 to 400,000 coins in bones alone if you buy them retail. Not ideal for an Ironman trying to save every copper. The Dark Altar phase from 75 to 99 requires about 51,000 bones. Most of those come from monster drops inside the Nethership using the Necromancer book. The remaining deficit, if you ever hit it, can be filled with burial supplies you farm from nearby areas. You can also pick up regular bones from corpses in the Ruins of Kamfrea just outside the Nethership entrance if you need a quick top-up.

Osrs Ironman Prayer Training Alternative Methods

If you absolutely cannot reach level 75 without hitting a wall, there is a fallback. You can use the Eoc altar after completing the Eye of the Chain link quest, which gives you 100% bonus XP on Prayer. It is decent for the 50 to 75 range but still far slower than the Dark Altar and requires quest progress you may not have. I do not recommend it as a primary method. It is a stopgap at best. There is also the temptation to use the Bathhouse at the Temple de Confession. The bathhouse gives you a small prayer XP boost but the rate is still pathetic compared to the Dark Altar. You would need hundreds of thousands of bones and still end up behind. Skip it.

IRONMAN AFK Prayer Training - [OSRS] Quick Guide - YouTube
IRONMAN AFK Prayer Training - [OSRS] Quick Guide - YouTube

What This Method Actually Costs You

The honest downside is time. The Dark Altar cycle is about 1.5 seconds per action. Even at peak efficiency you are looking at roughly 20 to 25 hours for the 75-99 range if you never miss a cycle and never die. Add in banking trips, death penalties, and the occasional login disruption and you are looking closer to 30 hours of real commitment. The 1-75 phase adds another 35 to 45 hours depending on your bone sourcing speed. Total investment for a pure solo Ironman run sits somewhere between 60 and 80 hours of active play. It is not quick. It is not fast. But it is the only method that does not require trading, external help, or items you cannot realistically obtain on an Ironman account. If you want the absolute minimum time investment and are willing to use a second account, bringing a friend who carries you bones and runs the Necromancer book for you cuts the 75-99 phase down to under 15 hours. But that defeats the point of playing Ironman. Do what you can solo if you are committed to the mode.

The Practical Setup

Bank at the Nethership landing zone. Keep your inventory organized: one slot for Sacrificial bones, one slot for a prayer book, one slot for any backup bone type, and the rest for healing supplies and teleports. Do not bring more than three teleport options. Falador teleport, Games Necklace, and a single emergency teleport. That is enough. Make sure your Necromancer book is equipped before you step into the Nethership. The buff applies immediately and lasts for the duration of your stay. If you log out and back in, you need to re-equip it. I learned that the hard way on a Saturday morning when I logged in, started cycling, and realized I was getting half the expected XP because the book was sitting in my equipment tab and not actually active. There is no shortcut. No hidden trick. Just consistent cycles, careful bone management, and the patience to watch the number go up one action at a time. It works. It is just slow, and that is the honest answer.