1. https://wowroad.info/?spell=42926
2. Аое лужа стакается если кастовать нонстоп один ранг спела.
3. Аналогично взрывному выстрелу лужи одного ранга стакаться не должны, должен проходить директ урон и лужа перенакладываться, то есть при спаме лужа даже тикать не будет если каст быстрее 2 сек.
https://gnomeaggedon.wordpress.com/2...mestrike-spam/
Буквально расписана механика каста 2 разных лвлов абилки чтобы висели 2 лужи.
The dots on Flamestrike don’t stack (ok, I knew that bit, or at least assumed).
However, the dots on Flamestrike(8) & Flamestrike(9) do stack.
https://www.wowhead.com/wotlk/guide/...-abilities-pve
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Arcane Mage DPS AOE Rotation
The new main spell for Arcane Mages in AoE situations is Blizzard, this spell can now critically hit and has higher scaling. If either on the move, or very end of an AoE pack - Arcane Explosion is a solid option since it's an instant cast and will waste less mana if mobs are dying very quickly regardless.

Presence of Mind can also be used to activate the 30% Critical Strike Buff from Arcane Potency and it'll be active throughout an entire Blizzard.
This Blizzard won't actually use the Presence of Mind, so the instant cast part can be used for a Flamestrike after the end of that first Blizzard cast.

With this in mind, a optimal burst AoE rotation will either be:
Spam Arcane Explosion if moving through a Raid.
Or:
Cast Presence of Mind;
Passive Arcane Potency;
Cast Blizzard;
Cast Flamestrike;
Spam Blizzard.
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https://www.wowhead.com/wotlk/guide/...-abilities-pve
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To start, if you think mobs will live longer than 12 seconds, you should cast Living Bomb on as many mobs as you can. Also if the mobs live long enough, it might be beneficial to use two different ranks of Flamestrike, rank 9 and rank 8 - their mana cost is the same but the apply two different dots in the floor.
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43:42 целый раздел про ранги огненного столба.