First things first: Here is the match info
And match ID: 5541254920
We had a pretty average run, with OK-ish Scepter Shards and few lives when reaching the boss. This is what we had entering the final fight.
We managed to do 170k damage (about 75% of his HP) before three of our heroes died. Leaving WW (me) alone versus the boss.
They told me i should just die so we could start another run. But i had Winter's Curse up and there were some golems alive so i wanted to see what would happen if i ulted the boss, and oh boy that was the correct decision.
The tip i have for WW players is: If you have one or more shards that give your ult some attack speed, or even duration. You can probably solo kill the Apex with it. Play it slow, don't even try to auto attack and just dodge until your ult is up again. Golems do 1360 attack damage and you can have like 10+ alive at the same time. And if you use Bloodthorn that's a crazy amounts of damage.
Edit: Just thought of It now, imagine if I had the Foul Cursing shard, 50% more damage on the ult.