Some tips on Lord Vader Buffs for better synergy with DSCT

Buffs in Green 

Vindictive Storm (Basic)

Deal Physical damage to target enemy and if Lord Vader has 30 or more stacks of Underestimated, he deals damage again. Also if all allies are Dark Side Clone Troopers, Lord Vader deals damages again. If the target has Order 66, Lord Vader calls CC-1119 Appo to assist. 

Each time this ability deals damage in the same attack, it deals 25% more damage (max 50%).

Ashes of the Republic: Deal damage again

Dark Harbinger (Special 1)

Inflict Buff Immunity and Healing Immunity for 2 turns and deal Physical damage to target enemy. This ability deals 20% more Physical damage on subsequent uses (stacking, max 5 stacks). If the target has Order 66, call all Dark Side Clone Troopers to assist, dealing 50% more damage. 

Lord Vader gains 1% Ultimate Charge and Empire and Dark Side Unaligned Force User allies recover 0.5% Health for each stack of Underestimated. The effects are doubled if all allies are Dark Side Clone Troopers.

Ashes of the Republic: This attack also deals true damage

Unshackled Emotions (Special 2)

Deal Physical damage to all enemies and inflict Daze and 4 Damage Over Time effects for 2 turns, which can't be resisted and dispelled. For each stack of Underestimated, this ability deals 2.5% more damage, and all Dark Side allies gain 1% Mastery (stacking) until the end of the encounter.

Ashes of the Republic: Inflict Ability Block for 1 turn which can't be dispelled or resisted, and increase target enemy's cooldowns by 2

Twisted Prophecy (Unique)

Lord Vader is immune to Turn Meter manipulation and his attacks can't be evaded. At the start of battle he loses all Protection and gains that much Max Health, and Dark Side Unaligned Force User allies gain Speed Up and Stealth for 2 turns. Dark Side Clone Troopers supports also gain these effects.

At the start of each of Lord Vader's turns, enemies are inflicted with 2 Damage Over Time effects for 2 turns, which can't be resisted and dispelled. Enemies with Damage Over Time effects can't gain bonus Turn Meter.

At the start of each other character's turn Lord Vader gains 1 stack of Underestimated (max: 60), doubled for Galactic Republic and Jedi enemies. The doubled effect also applies to Dark Side Clone Troopers.

Underestimated: Vindictive Storm, Dark Harbinger, and Unshackled Emotions gain additional effects