1. Обтейнер
2. Abusing multistrike trinket bug, having multistrike effect without the trinket on.
3. X100
4. https://imgur.com/a/TeE5h
5. As you can see he has assurance + cleave trinket on, in the images you see "cleave" for sigil of rampage trinket and assurance does not have a multistrike effect therefor he is abusing the trinket bug.
Characters armory: http://cp.pandawow.ru/en/armory/char-1-6725637.html