Arch-Glacor: High Enrage (Necromancy)
Introduction
This guide is aimed at players looking to kill Arch-Glacor at 2500%-4000% Enrage and assumes strong underlying knowledge of all information presented in #Arch-Glacor Basic Guide.
This guide will also work from 0%, however should be adjusted as required.
The Arch-Glacor is not affected by Slayer tasks in hard mode.
Presets and Relics
Powder of Penance - Optional, replaces blessed flask at increased cost
⬥ 
Weapon poison used at bank
⬥ 
Darkness active
⬥ 
are active
⬥ 
Kwuarm & 
Spirit weed incense at 4 stacks
General Rotations
⬥ Rotations for Arch-Glacor are not strict, as per the random nature of the boss's mechanics. In general, aim to upkeep 
& 
as much as possible.
⬥ 
, 
and 
, are all high value abilities with medium-length cooldowns. Aim to put these abilities on cooldown before the pillars of ice mechanic blocks your line of sight. This keeps their cooldown ticking down, while you're using defensives to build adren during the mechanic.
⬥ Living Death 
is best used during the flurry mechanic. This mechanic gives you a long, uninterrupted window in which you can deal damage to Arch-Glacor. It can situationally be used to reset 
cooldown in anticipation of an upcoming exposed core mechanic. shouldn't be strategically reserved for arms, as the time it takes to clear the mechanic doesn't largely change with or without the ult active.
⬥ Ensure that some Necrosis Stacks 
(4+) and Residual Souls 
(2+) are held for the Exposed Core.
⬥ It is best to start the fight with , as it is a low adren investment that has no cooldown, and has high use priority during the fight. There is a 2/5 chance you get a mechanic (minions/exposed core) that will nullify your first attack. Therefore it is important to use a low-investment cooldown/ability before knowing what the upcoming mechanic will be.
⬥ Both tank gear and TFN should be bound for swapping.
• TFN gear should be used in the following conditions;
⬩ Exposed core mechanic is active.
⬩ Pillars of ice mechanic is active.
⬩ 
/ 
/ 
is active.
⬩ Equipped before casting .
⬩ Arch glacor is not casting any auto attacks, and you are at or below your max HP in DPS gear (~11,100).
⬩ Do not spam swapping between TFN and tank gear between every ability/AG auto, as this will frequently fluctuate your max HP, causing your reaver to heal you above 11K HP, however swapping back to DPS gear will nullify the reaver's healing effect.
• In all other situations, tank gear should always be worn in cases when you are taking damage.
⬥ It is important to note that ranged autos during flurry, will deal the most damage, as 3pc cryptbloom buff doesn't negate ranged damage. On average, the 3pc cryptbloom provides superior damage reduction over 4pc deathwarden.
Exposed Core (Arms)
⬥ Before the Exposed Core mechanic, ensure that either Necrosis Stacks or Residual Souls are built.
⬥ Have your conjures active and Ghost commanded 
.
• In some cases, it may be wise to equip 
excalibur to dismiss conjures, and re-conjure to refresh their timer before the next mechanic, if you are anticipating arms coming soon in the spec order. It is essential that conjures have a long enough timer to be active throughout the entire mechanic.
⬥ Use 
/ 
where required depending on adrenaline in order to use .
⬥ If you need to , use and flick to 
for 1 tick to get to 100% adrenaline.
⬥ ~20s into exposed core, you can swap to tank gear to benefit from 3pc cryptbloom's magic damage reduction% passive.
Example Arms rotation:
⬥ Closely follow the rotation below in priority of cooldowns and stacks available.
• If starting with low soul stacks (1-2), use 
over 
.
• Use 
& where appropriate to build adren and stacks before dumping.
• , , and 
should always be used first, as their damage is dealt over time.
⬩ 
→ 
→ (tc) 
+ → → → → (6/8 , use 
→ if at 12/12) → 
→ 
→ → 
Note: Use when required.
Note: If flanking, stand central or on the south wall next to the boss.
Clearing Glacyte Minions
⬥ Use → 
→ once at 5 stacks. continue casting 
& until at 5/5.
• Always cast before → , as this starts its 15s cooldown which lets it be available for a second use before #3
• Always target the bolstering glacyte. This causes perks such as crackling, and jas book damage to activate on it. With this strategy, bolstering glacyte at 4000% enrage should die shortly after the four weaker minions.
• Cast on the magic minion closest to the bolstering glacyte. This will cause vulnerability to apply to all five glacytes.
Rotation;
⬥ → → → → → → → 
→ 
→ → /
Note; movement used in example videos on minion clears helps reduce freezing blood stack gain. 10 stacks of freezing blood will apply a 3s bind and stun.
Defensive & utility usage
⬥ At higher enrage, you will want to prioritise defensives as follows,
• Frost Cannon: 
→ 
+ + 
→ 
+ 
(In TANK GEAR & max HP)
⬩ Always wear tank gear for this mechanic.
⬩ Alternatively; → / 
/ / 
/ / 
(hit 3, don't need to combo with defensives) / spam food + be overhealed with brew on first hit. Use of any one of these will ensure you survive the mechanic.
• Exposed Core (arms): → → as needed
• Glacyte Minions: (and, rarely, /
to block or clear stun)
• Flurry: / → (deals ~27k at 4000%) → if needed.
• Pillars of Ice: 
→ → 
→
⬩ can deal damage even if the player doesn't have LOS, depending on the skeleton's position.
Example Kills