Fire Mage Instant One-Shot Exploit, Works In Arena (FIXED) (Patreon)

EDIT: FIXED on Monday. I'm leaving this up because I'm pretty certain there are or will be other exploits on similar lines. 

Fire Mages have a level 50 talent called "Pyroclasm". The tooltip reads

Pyroclasm

Talent

Requires Mage (Fire)

Requires level 50

Consuming Hot Streak has a 15% chance to make your next non-instant Pyroblast cast within 15 sec deal 240% additional damage.

Maximum 2 stacks.

As you'll know if you saw my most recent video pyroclasm can be set-up to one-shot most players. However, the 4 second hard cast time makes it impractical for things like arena where good players will rarely give you that much time to get the pyroclasm off. 

Currently however there is a way to get an instant cast pyroclasm off in arena. 

Basic Method

1. Duel with someone before they enter arena. 

2.Attack them until you get a pyroclasm proc. 

3. Now have your opponent use an immunity mechanic-paladin bubble, ice block etc. 

4. Cast Pyroblast

5. Enter arena.

6. You will find the first pyroblast you cast does full  240% pyroclasm damage. This includes instant cast pyroblasts you make with hot streak. 

Alternate Method

1. Dps  anything until you get a pyroclasm buff.

2. Have a friend use cyclone, banish on any mob (including critters). 

3. Cast pyroblast on mob.

4. Enter arena

You should be able to get any rating you wish with this method, though there is a non-zero risk of a ban. Experienced players may wish to save their damage modifiers so the pyroclasm strike isn't as noticeable. 

Naturally this is classed as a pvp rather than gold-making method, but you can make a ton of gold boosting players with this technique.

Kenneth from Ownedcore kindly shared this with me, the original source is a vod from the streamer Mitch Jones.