A Deck using the "Flamvell" archetype will essentially be using FIRE monsters, most of which have 200 or less DEF, and their trump card, "Rekindling", can get you up to 5 monsters at once. This could lead to various Synchro Summons, or if you have a "Flamvell Archer" handy you can tribute it, "Flamvell Baby", or "Flamvell Poun" in order to add 800 Attack to each one giving you a total of 3200 extra attack points.
Accel Synchro Summon Flamvell
This deck uses the "Flamvell" cards to quickly summon Red Nova Dragon and/or Shooting Star Dragon.
This Deck's strategy is to mix "Flamvells" with Zombie-Type monsters, since some of the most beneficial Zombie monsters in the game share 200 DEF, the same as a majority of "Flamvell" monsters. "Flamvell Poun" makes an excellent search card because of that, netting the player either an "Immortal Ruler", a "Spirit Reaper", or a "Plaguespreader Zombie".