Im sorry to say the map must of took 10 mins to make. And did you even play your map? I played it for like 10 mins. Was in middle lane then i looked at bottom lane and horde had like 15 heros down there and like 5 lvl'2s while the allince had 4 heros being slaughtered each time they came. Same was happeing to top. And first time hero wave came there was masslag. and i ussaly never lag :/
My suggestions
1. Balance them out some how.
2. Get some items, some mana regen items, life regen items, etc.
3. maybe let the horde/allince heros use spells(the heros in the waves)
4. After around 10 mins. make there spawned hero waves become a higher lvl(this would be easy on the spawn trigger, copy it and make a new one but make it so it highers the lvl then make a new trigger, make it wait 10mins. then for it to turn off spawn trigger and turn on the spawn trigger with higher lvl's)
5. And the heros..... You used all the war3 hereos, unchanged at all. Make new spells and new hereos, for spell ideas go to the spell section of the site :?
6.Snice theres lots of hereos in the lane, 4 plus you , lvl really slow :/. And if you were in bottom lane wheere there was like 15, that would take ages to lvl. Snice you lvl slow, make it so you lvl faster, your maybe stonger spells when you lvl.