All sounds cool really and thanks for clarifying my questions. :)
So what kind of narrative skills and form are we talking about, I am sertainly not the best at it and I can become quite awkward at moments as Swedish is my primary language. Either way I will pitch a cs to you and see if I am getting it right. :)
If I'm understanding your question correctly, then it works like this:
The person posting decides that, before posting, they want to go into fight with another player or enemy. Stats for both sides are gathered and put threw the equations to determine who would win the fight. Once the victor is decided, the GM (me) tells the player the outcome.
-If the player wins the fight, then all they need do is describe in their post how the fight commenced
-EX: While John was walking along the path, he wasn't paying attention. This ended up being a major draw back to him, as a wolf-type enemy appeared and got in the first strike before John could even draw his axe. After John readied himself, the fight ensued.
Even with John's skills and stats, the fight was taking longer than he wanted. Skill after skill, parry after parry, the wolf and John were an even match for each other, and the wolf was only three levels ahead of John. Though, with a little perseverance, John came out on top, but not until he lost nearly half his hp. John would either need to call it a day or...........
-If the player would lose the fight, then the player and the GM need to decide what is going to happen to their character unless someone else decides to assist that player before they die. Either way, once all parties included in the situation have come to an agreement as to what happens to all of their characters, the active player (the first one to be attack/attacking) makes their post, in as much detail as they desire. (As above, that was just a simple example. If you want to get down to describing the feeling of the blade strike your face, you can. Just be conservative and make sure your not spending 3 paragraphs explaining one action.) After they have posted the scenario for their character's dire situation (or escape, if you prefer), any other players involved would post in an order predetermined in the discussion before hand.
As for form, if the above stuff doesn't explain it, I'll be honest. I'm a little confused by that word. Are you asking about how the posts need to be described, or about the format for typing out the battles?
If it's the former, then that is dependent on the person posting. Get as creative as you can and/or want. Just don't go over board and use one post to describe 3 seconds worth of story.
If it's the latter, then this is also up to you. You can get down to explaining what skill your character is using at what interval in the battle...
-EX: John used his Armor Pierce skill to lower the enemy's defense, then lunged forward to sink his dagger in the enemy's skull.
... or you can use the above example and just describe a decent fighting scenario to explain the outcome of the fight.
And if I didn't understand the question at all, then I'm sorry. I'm still getting used to typing rp, rather than dnd rp, but I'm slowly getting caught up.