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The deck is quite simple, Ive designed it myself (I don't know if there already exist look-alike decks). It contains one rare card (fahrenheit), if you don't have that, it can be replaced by either a fire shield, deflagration or another fire pillar. I am using this to grind the T50 for rare cards. Perhaps the winning rate isn't awsome, but I feel like it works better than the decks mentioned here (
http://elementscommunity.org/forum/index.php/topic,11026.0.html) (unless I just had bad luck).
The strategy behind this deck:
13x fire pillar/pendulum: quanta production, obviously. Having too many quanta isn't a problem because of fire bolt/fahrenheit. It uses a mix of pillars and pendulums to protect against earthquake.
6x fire bolt: creature control. Lots of creature control. When fighting a rush deck, use this to kill whatever the opponent spawns. Try to disable the opponent of playing (powerful) creatures. Works especially well against grow decks (kill them before they grow). If you have quite some quanta reserve and the enemy is getting low on health, you can cast them on the enemy to finish him off.
4x deflagration: pernament control. Use this to get rid of annoying shields, weapons, or otherwise, their shards of gratitude (which seem to be popular).
1x fahrenheit: this isn't really that important, but it's cheap, and if it doesn't get destroyed, it can deal an increasing amount of damage against opponents which keep healing theirself with very low damage output. And if it is destroyed, it can have saved one of your pillars anyway. This is useful when you need a little bit more damage than your phoenixes can deal (against self-healing opponents).
6x phoenix: this is your main damage output. The phoenix is (because of her rebirth ability) the most resistent fire creature, so I used them because you don't want all your damage output being killed. This isn't a rush deck.
Some changes to this deck which could be made are removal of fireblots and adding fire pillars instead, or adding a fire shield. I am not sure about the optimal numbers. Currently, the quanta index (
http://elementswiki.co.cc/articles/empirical-evidence-to-support-qi/) of this deck is 5.07 (if counting the mark as a pillar).