Hmm. So I've examined your map for another 30 minutes and I have to say, I can't approve this. The main reason? The heroes are very basic. Many are default melee heroes, and the custom ones are just a mash of abilities from the default heroes. The blademaster and the demon hunter weren't altered, that is a major issue. Out of the 6 heroes I've tried, those heroes kill much faster than other heroes and their spells are crazily overpowered in hero vs hero fights (They are easily the best in melee, but they aren't the best AoE dealers). Spells like resurrection are near useless in this map, there is nothing to resurrect unless you posses a creep. You have a few mistakes on the items, the iron helm costs 450g and gives +7 to all stats, and the Helm of Heroic gives +4 to all stats and costs 500g. Heroes take such a long time to gain EXP, adding on to that is the repetitiveness. I don't exactly want to do the same dull thing over and over to gain 10,000g for the max tomb.
I do like the terrain and the concept, but there can be so much more done to this map. Your Age of War map was great because it was creative and it was nostalgic. This map is slow, boring, and just another arena using mostly default heroes. You did execute the duels well, I didn't test the bosses because I didn't want to get to level 10.
I recommend you work on a new map, but just incase you've wanted to make huge improvements to this map, I've put it to await update/needs fix. You can post in map development or idea factories to make the map more interesting.