It's The Winter's Run (Archon Priest) Strike with the following modifiers.
-Epic
-Juggler
-Lightswitch
-Arc Burn
-Nightfall
Here it is solo in 20 minutes
Praedyth's Timepiece (Arc Primary)
Patience and Time (Arc Sniper)
Hazen Vengeance/Thunderlord (Solar heavy for shanks then Arc for the boss)
And the Weekly Heroic Strike is the same thing, but only with Heroic and Lightswitch modifiers.
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Heh, somewhat less shambolic than my runs earlier today...