Perhaps part of my mistake was not clearly defining what I meant by Combat Scenario. I didn't envision it as an entire dungeon or anything of that scale, more like the equivalent of a single battle in a Final Fantasy game or something. Like, each player would write between three and five paragraphs for a single Battle Scenario. So that dice roll would only dictate that single three to five paragraph post. 

An example of a common Battle Scenario might be a bandit attack while they are traveling. Let's say we have one bandit for each player to write out a three to five paragraph scene of their character fighting that bandit. Let's say you roll a 1. While the ultimate outcome of that post may be somewhat predetermined, it's up to you to decide how it gets there. Maybe you want to write your character totally kicking ass at first and then the bandit gets him with a poisoned dagger at the end. You still have near complete creative freedom for that post, the only thing the dice roll is determining is the overall performance of your character in that single battle post.