This map is very played in our competitive scene, for mixes and clanwars, it's intended for 3on3 or 4on4(but in 4on4 it's ct sided).
The idea here is to give it a better looking and few modifications, once you got that, you can make a diferrent version, maybe make it larger so it can be used for 5on5 too.
This is the map
And here i uploaded the map:
http://www.mediafire.com/download/if3qxam7mdzvfv5/piast.zip
Notes:
-Lightning engine is not very popular in the competitive scene so dont put so much effort on it, because for example i have it disabled.