Notes & Combos
It took me awhile to get the hang of this deck because a decent amount of people instantly scooped at the sight of Bonfire or the first normal summon. The quality of duels is also pretty low towards the end of the event period, I played against a bunch of Plat/Gold players at lvl 19 which was not much of a challenge. Regardless this deck is definitely extremely powerful and I understand why everyone is sick of the FIRE meta. This deck is a lot more versatile than pure SE though and is a lot more fun so I highly recommend :)
Standout card was definitely Subversion because of its usefulness against stun, as it lets Normal Summoning Poplar be an out for Dyna/Barrier Statues. Kirin was also amazing for niche situations like summoning Knightmare Phoenix and dodging Skill Drain. Tactics and Nib can be replaced for Veilers or other handtraps. For the Extra Deck, I would maybe cut Goddess since she didn't really come up; alternatives could be Heatsoul or Duelittle. The only situations I was uncomfortable in were being under Shifter and Maxx C -- otherwise this deck can play through a lot just with pure engine.
The mirror is unfortunately just a handtrap war and whoever pops off first usually wins.