Hand crossbows.That drow was either a PC wizard or a sorcerer. He must have invested a lot in tumble points. I believe it was a jump & tumble combination?! I know with 30+ tumble you can do back flips already on LIVE. I had a rogue that once had high tumble that can do that. Its probably good for show, pretty useless skill otherwise.
The PC party composition looks like a gimpy divine caster not casting blade barrier, implosion, nor destruction (most likely a low DC favored soul since I do not see a positive energy aura; but no Blade Barrier?!). A druid, an arcane caster (most likely a wizard since they were no elemental savant hints on the hands) and judging by the spells he casted, i.e. meteor shower, prismatic spray, delay blast fireball, lightning bolt, wail of the banshee, magic missile; there are no new arcane spells. The wizard was also not a Pale master with a pretty low spell penetration, low DC wizard since I did not see any crowd control or instant kill spells working (okay, may be one finger of death went off on a vine thrasher)... and blue spell resistance auras showing up a lot... and I mean *A LOT*.
Also, they were not casting any damage over time spells? No DOTS?!?
I saw the druid was casting some fire aura (regenerate?) spell, and also Flame Blade on his scimitars. Also shape shifting into wolf, winter wolf, fire elemental and water elemental.
Did not see any high level druid spells like Earthquake, Creeping Doom, Call Lightning, Call Lightning Storm or Storm of Vengeance. A melee druid perhaps?
The last member was most likely a monk outfit wearing barbarian sometimes holding the Epic Sword of Shadows, and sometimes duo wielding some khopesh.
Also, the drows they fought sometimes were fighting with bare hands... the animations did not look like monk kung fu animations at all. Were they using handwraps?... if they were ranged, they seemed to throw invisible darts or bolts.