»Requirements to build a new Annihilation Map

Hey guys, I just had some really good ideas for some new annihilation maps. But I don't know how to start. I know how to use MCEdit and WorldEdit, but that's not my problem.

Firstly, what are the dimensions of the map? 350 x 350? Or more? And how do I get this preset? or how do I get a superflat world that's 350 x 350. Also, are there any professional tutorials that anyone might have for tips in building one?

Secondly, is it okay that I'm making the map with 1.8? Will annihilation be updated to 1.9 on GC? Will it have any effect?

Lastly, are there any new additions to annihilation? Any new other things that I might have to add rather than just the typical mines, bases, boss spawn points and etc.

 

1. Each side of the team should be 150x150 or 200x200. The area in between each team should be 50-75 blocks wide.
2. Currently, we are not going to update annihilation to 1.9 yet.
3. You should add a nether portal in each base (to change kits without dying).

This tutorial will help you:
http://guildcraft.org/threads/guide-how-to-make-a-annihilation-map.103/

I hope you will make an awesome map

 

Thank you so much!