Oh... You're the most obtuse person I've ever met... If you're even a person at all (and not some kind of necromancer :D), no offense ;)
Let's go through this point by point:
The Ash Race? Well, that just won't work, sorry...:( If you don't like the Fire Race, you can change it, but the Ash Race is even worse...
Invisibility - let's say for 3 turns, one mana per turn, and a total of 3 mana (or not 3),
Fire Lizards... (LOOK LIKE DEMONS???!!! You've got to be kidding...) They should have less health, less attack, and more defense than demons, and demons DON'T ATTACK across the map... and Fire Lizards don't shoot at range...
Incarnations, Fire Entities... Remember the Necropolis Ghosts? Well, imagine these ghosts are fiery, take up more space, and don't wander around in torture chambers... (DOWN WITH THE INQUISITION!!!) and they cast spells at the same time... you could make them an orange mist from which two hands protrude, gradually taking shape, and a vague head appears, with two red eyes burning...
The Ifrit hero... well, you could make him an elementalist, but you'd have to bring back the Fire Elementals to the army, so choose...
And why wouldn't this race have a place in Heroes?! Well, you could make it NEUTRAL, but with upgrades and a castle... (that's a cool idea!)
P.S.: If you have any questions about the hero's unique abilities, write them here, in this thread, I check it often...
And the fact that there are no archers (except for the Salamander) - well, there has to be some kind of drawback for balance...
In my opinion, Heroes 5 is a place for catchy names, and the Fire Race will sound as unappealing as it did in the third game.
So, why give the lizards an explosion if they already shoot?
What about the Fire Elementals then - will they remain neutral - are we going to throw out all sorts of trash? No, that won't work.
Then the spirit turns into some kind of weak mage, at level 1 and with 3 mana.
Regarding the entities - well, let's assume they cast spells and let's assume they have etherealness (although etherealness is only characteristic of necromancers) and they're still too strong.
In general, I think that one could only think about such a race before the release of the expansion with the dwarves. Without fire dragons, they look weak even with a phoenix - that's just not right.
