http://www.mediafire.com/file....nor.w3gdata: base damage 5840 +19700 items: 1.slayer armor 2. ds 3. ruby 4. mugen 5. possessed albered 6. fin artifact.
In a game i reached also 7100 base damage but to achieve this result i did all the time this path: mid lane revenant crabs. no gem no neutral bosses to save time. data: 7100 base damage + 21.000 items : 1. absolute 2. ds 3. ruby 4. possessed albered 5. boss hunter lev 34 6. mugen. lost with death. so seems that slayer armor and fin art is better of 12600 base damage increment.
Added (2016-12-28, 4:17 PM)
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i failed  to see polania replay because  is old version warcraft

Added (2016-12-28, 4:19 PM)
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+1260 not 12600, obviously