seems, Commander-ish to me, this would do better in that format and with 60 more singles, otherwise, you may want to 4x some of the cards you have. berserkers of blood ridge seems a little out of place to me.

On another note, Gisela and fire elemental are best friends with lava axe :-)

i would recommend taking a look at Furnace of Rath to keep in the gisela flame servant concept.

i would check out Boon Reflection, Beacon of Immortality and or Celestial Mantle to help with life gain.

alot of damage all cards so maybe some Mogg Maniacs or Spitemares. maybe throw in some Blasphemous Act s if you do.

for replicating maybe look at Djinn Illuminatus, Radiate, Izzet Guildmage. with izzet if you throw in some Lava Spikes and Desperate Rituals you can net a infinite damage combo.maybe Pyromancer Ascension too. And i personally like Charmbreaker Devils as a small but very useful addition.

for mana acceleration take a look at Gauntlet of Power Caged Sun both good for creatures too Mana Flare (i wouldn't recommend it though it can be useful with its low cost), braid of fire (only good for instants but free spells are still good) , Seething Song maybe Geosurge for your bigger creatures.

Curse of Bloodletting?

You need to take out a couple of these cards like Flameborn Hellion or Fiery Hellhound 4x Furnace of Rath would be nice, and Safe Passage is sort of out of place

Jaya does make a nice addtition to this deck though

In general it's good to to keep decks down to 60 cards in order to be consistent. This deck has a lot of good cards but many of them don't have much synergy. I would cut a lot of the very high mana cost cards, and run 4x of the more important burn spells like , Caged Sun, Earth Servant and Flameborn Hellion can all be cut. You also seem to be trying to incorporate some life-gain with cards like Searing Meditation and Ajani's Pridemate; I think it would be better to either expand on this theme or take it out all together; right now it's kind of half-there without a playset of any of the important cards. If you decide not to flesh out the life-gain theme more, you should consider whether to even keep the white at all. Furthermore Pyromancer Ascension is not bein used to its full potential here since you're only running 1-2 of a lot of cards. Since that card relies on multiple copies of a card in your deck, you should either take it out or run more full playsets.

To summarize, here are my main suggestions:1. Get it down to 60 cards. 2. Take out mana-intensive cards that don't fit the theme.3. Run more copies of your low-cost, staple burn spells.4. Figure out whether to flesh out the secondary theme of life-gain more or take it out. 5. Consider synergy more when deciding what cards to keep.

I hope that helps.

thanks