I've made a ton of infection maps so I tried my hand at making some slayer maps and I think this one turned out best, please download it and give me your feedback. It works with the standard slayer gametype and any mild variations. pictures: Download death-site here: Bungie.net : Halo 3 File Details
Although this is quite good for a first attempt at a slayer map, I think you should look other maps posted on forge hub and the criticism of these to understand what makes a map great. As this is your first attempt at slayer maps I think it would be best to begin in skybubble, where escapibility will not be a problem. My best advice is to start simple