Song: Intro -Tempest Rise Again- -SHO
Item level: 725
Recorded via Fraps@60FPS

There isn't much that changes from Heroic to Normal but there are some things to note.

During the Night Phase Tsulong will periodically spawn four adds (The Dark of Night) that will creep towards the Sunbeam. If any Dark of Night reaches the Sunbeam they will detonate dealing heavy shadow damage and removing the remaining light from the Sunbeam. Quickly kill the adds and continue to DPS while inside the Sunbeam.

The Day Phase in heroic is very similar to the normal counter part however the adds do significantly more damage to Tsulong. Furthermore, the adds also spawn much faster making it very difficult to keep adds from damaging Tsulong and causing the next Night phase to start from a high percentage of health.

The integral part of surviving Night Phase is to keep Dread Shadow stacks low by standing in the light and making sure to use feint for Shadow Breath.

In the Day phase it is crucial that the Embodied Terror is killed shortly after it spawns or else it will cast Terrorize which will result in practically a health reset on Tsulong's Night Phase. The Fright spawns that spawn when a Terror is killed do not do damage to Tsulong and additionally move quite slowly, so these can be temporarily ignored in order to allow for the clearing of some Unstable Sha.

Night Phase TL;DR - Kill Dark of Night, stand in beam, feint breath.

Day Phase TL;DR - Embodied Terror - Unstable Sha - Fright Spawn