Another very good set of perks, but this time was with my weakest Hero - Mortis is only 1*/9
Video from room 506:
I was able to get the following perks from Hidden Treasures:
- Springs
- Heavy armour
- Dwarf
- Big attack up
- Poison
- Backshot
- Flamethrower
- Move Speed Up
- Fire shots
- Adrenaline (missing in the above screenshot, forgot to take pic at the end)
Endless Boss runs are quite easy once you get the right perk build - as you can see in most rooms you just stay still and let sustained fire do it’s thing 
I’ve twice crossed 1,000 in Endless Boss runs, but that was before they pulled Haggler and this time it was with my weakest Hero (Mortis is 1 Star, Level 9) so I wasn’t expecting to get so far. I was still hoping to get the maximum level ups (25) and was probably ~40-50 rooms short - I’d reached 24 at Room 400 and was about 5/6ths of the way to 25.
I was doing reasonably well until I misjudged the tortoise and lost the necro, and 620 was really bad - survived the first hit by taking ~48k damage, got hit again (but dodged), got hit again and died, got a revive from an ad, then landed on the boss and died 