Every delve is now tuned for a full party of five and no longer gets easier for smaller groups. Clearing one short-handed is a test of skill.
Delve monsters hit much harder and take far longer to kill. Regular packs want a tank holding them and a healer keeping everyone up. Elites, with gold "Elite" plates, need focused damage, interrupts and active healing.
Elite adds. One boss in every delve now calls an elite helper partway through the fight. Someone has to pick it up, interrupt it, kite it or kill it first. Listen for the boss's call.
Lamplit is harder still, with a little longer before its bosses enrage.
Delve experience is a little better than fighting outside, and the loot is still all yours.
