Match id: 5542180262 https://www.dotabuff.com/matches/5542180262
(My team left at stage 1, so I solo it from there. I will try soloing rank 3 or 4 tomorrow, or on weekend) I dont know if it count as abuse or not, because this build makes ursa 100% invisible all the time (like slark ultimate), so any enemies can't detect/attack him, including the final boss. I also solo the Broodmother Elite stage with this.
Almost 0 damage vs FINAL BOSS, the boss only use 1~2 spells. He can't use any skills after all my teams (left players) die because he can't see my ursa. I believe this build work on higher difficulties as well, will try later...
TLDR, just get octarine and get any 1st skill/ultimate related cdr/duration. No skills needed, just press Q + R.