The Endless Spires difficulty scales a lot more forgivingly than I expected.
- Dragons Lair and The Abyss (both 150) were both more restarts than clears with all characters at full 125 iLvls.
- I just cleared the final combat challenge of 100 consecutive Endless Spires levels (beat level 249 and still going) on my first try. I used no flasks, have an average iLvl of 143 (accessories are mostly still 125), and my characters are still wearing mostly Luck equipment because I hadn't gotten around to farming full end game defenses. Only one character even has Heart of the Abyss because most of the dropped enchant combos have been unlucky.