oh lord DotA sucks... I've made better maps
http://www.wc3sear.ch/?p=Maps&Authors=Slayerdragon
Custom Hero Arena bisshes
Temple Snipers/Assault was best receieved (on maps.worldofwar.net)
and Capture the Flag AI is pretty cool as well
for Orc... I really don't have a really solid strategy. I like hh/wyv. especially if you get the tier 1 upgrades for HH during a rush. 1/1 mass HH backing up melee is usually pretty effective if you focus fire or at least dont suck at microing. Getting wyv soon after can be crucial if they don't have enough AA.
Night Elves suck. that's all there is to it. Try dryads/bears maybe. or air using hippo rider/chim
Humans I almost always go foot->knight because it's fairly easy to get knights quickly. Use 2 rax
Undead is my best race. I have a killer semi-tech with UD.
Action order
1) Send 2 aco to mine
2) send last aco to build a crypt
QUICKLY for 3-4
3) send ghoul to mine
4) build 2 aco (rally on mine)
5) have the aco on the crypt build a zig on the way back to the mine
6) have last aco mine
7) as soon as you have resources, build altar
8) build ghouls up to food 15 (+hero is 20 food)
9) upgrade halls of the dead as soon as you have resources
10) graveyard and another zig
11) build more ghouls (I usually end up with about 10, which is enough to defend a rush if ur allies help)
12) another zig
13) when the Halls finishes, warp in 3 temples of the damned
14) pump about 6 necros
15) attack
unless ur opponents are anticipating this, or they're freakin good (or ur allies freakin suck) it should be gg
I usually switch to aboms ASAP after the rush if the game isnt over, since everybody goes mad counter magic after nearly getting owned by necs the first time
since you have 10 ghouls mining, there should be enough lumber in your store to just attack with all of them + the 6 necs
this should happen by about midnight, maybe a bit past