On one boss Frost is a filler with two procs on top: you cast 
Frostbolt until 
Fingers of Frost or 
Missile Barrage gives you something better to press. There is no resource to pool and no damage cooldown to save.
Before the pull
- 1At -3 s: Cast Frostbolt
Start a Frostbolt 3 seconds before the pull, or 2 on three bosses, where you stand closer. It takes 2.5 seconds to cast and a moment to fly, so it lands as the fight starts and begins your Winter's Chill stacks a cast early. It is worth 94.9 % of your damage on a one-minute single-boss fight, more on short fights.
Priority
Each time you can act, cast the highest line whose condition holds. Most of the time that is the last line, Frostbolt.
- 1Use the other cooldowns as they come up+37 DPS · 5.3 %
- 2Cast
Ice Lance if Fingers of Frost active4.8/min+8.4 DPS · 1.2 % - 3Cast
Arcane Missiles if Missile Barrage known and Missile Barrage active3.3/min+22 DPS · 3.1 % - 4Cast Frostbolt19/min+665 DPS · 94.9 %
The lines whose reasons the widget can't show:
Mana Ruby below 80 % mana. The line is worth 0.0 % on one boss, where your pool, Mage Armor's regeneration and the Robe of the Archmage's mana already last the fight. Use the gem when all of it fits under your maximum mana, so none is wasted.- Your other cooldowns, on cooldown.
Talisman of Ascendance goes at the pull and every minute after, because each spell you cast in its 20 seconds adds 40 spell damage to the next ones, up to five stacks. 
Robe of the Archmage is mana and can wait. - Ice Lance while Fingers of Frost is up. Both charges go to Ice Lance: it is instant, deals four times its damage against a target treated as frozen, and takes Shatter's 50 % crit. The line is worth 1.2 %. If the proc lands while you are casting a Frostbolt, finish the cast first. Our simulator gives that Frostbolt no bonus and saves both charges for the casts after it, which the beta hasn't confirmed yet.
- Arcane Missiles while Missile Barrage is up. The proc makes them free and fires all five missiles in 2.5 seconds, the same time as a Frostbolt. The line is worth 3.1 %.
- Frostbolt otherwise. Every landed Frostbolt rolls 15 % for Fingers of Frost and 20 % for Missile Barrage, and adds a Winter's Chill stack.
More than one target
Against three bosses in reach, the rotation changes almost completely.
Put 
Cone of Cold at the top whenever all three bosses stand within 10 yards, then Ice Lance on Fingers of Frost, then 
Arcane Explosion, with Frostbolt last. On a three-minute fight against three bosses Arcane Explosion does 59.2 % of your damage and Cone of Cold 25.3 %. Cone of Cold's chill rolls Fingers of Frost on every boss it hits, so each cast has three chances at a proc.
Mana is the limit here. Cast Arcane Explosion while your mana percentage is higher than the share of the fight still to go, and Frostbolt when it isn't, so the pool runs dry as the fight ends. On three minutes the searched rotation can also channel 
Evocation below 45 % mana with about a minute or more to go. Our simulator stands you 8 yards from all three bosses and never moves them, which a real pack may not allow.
Cooldowns
Frost has no damage cooldown in Forever: 
Cold Snap has nothing to reset on one boss, and there is no Water Elemental. What the sims use are trinkets and mana. Talisman of Ascendance goes on cooldown from the pull. A Troll uses 
Berserking at the pull on short fights, for 10 % casting speed over 10 seconds. On three bosses the mana items count: on three minutes 
Major Mana Potion is worth 15 DPS and 
Demonic Rune 11 DPS.
| Cooldown | Uses | At |
|---|---|---|
| Berserking | 1 | 0:00 |
| Talisman of Ascendance | 1 | 0:00 |
| Cold Snap | 1 | 0:00 |
| Robe of the Archmage | 1 | 0:05 |
 Frozen Heart of the Mountain | 1 | 0:22 |
What your log should show
Hold a Warcraft Logs report of your own against this table.
Fewer Frostbolts a minute means time spent not casting. A low Ice Lance count means Fingers of Frost charges expired or went to Frostbolts.
| Ability | Casts per minute | Of damage | Crit |
|---|---|---|---|
| Frostbolt | 19.2 | 63.9 % | 24.0 % |
| Ice Lance | 4.8 | 19.6 % | 80.9 % |
| Arcane Missiles | 16.2 | 16.5 % | 25.4 % |
| Talisman of Ascendance | 1.0 | – | – |
| Frozen Heart of the Mountain | 1.0 | – | – |
| Major Mana Potion | 0.0 | – | – |
| Arcane Missiles | 3.3 | – | – |
| Demonic Rune | 0.8 | – | – |
| Robe of the Archmage | 1.0 | – | – |
| Cold Snap | 1.0 | – | – |
| Berserking | 1.0 | – | – |
On a one-minute single-boss fight that is about 19.1 Frostbolts a minute, 5 Ice Lances a fight critting 80.9 % of the time, and Frostbolt near 63.9 % of your damage. The first Arcane Missiles line counts each missile as a cast, five to a channel, and the second counts the channels.
Uptimes
| Buff or debuff | Uptime | Times per fight |
|---|---|---|
 Winter's Chill | 99.3 % | 22 |
| Ascendance | 34.4 % | 1.0 |
| Ascendance | 33.3 % | 1.0 |
| Frozen Heart of the Mountain | 25.0 % | 1.0 |
| Berserking | 16.7 % | 1.0 |
| Arcane Missileson the boss | 13.5 % | 3.3 |
| Fingers of Frost | 13.0 % | 2.6 |
| Missile Barrage | 12.5 % | 3.5 |
 Clearcasting | 6.6 % | 2.2 |
Winter's Chill should sit near 99.3 %: five stacks from your first five Frostbolts, refreshed by every Frost hit after. Fingers of Frost is up about 13.0 % of the fight from 3 procs. Missile Barrage is up 12.5 %, so most procs are spent within a cast or two.