List Help and Tactics

Hello, I have been playing sisters for about 1 month now, and I am still having a hard time performing well. I don't have the most optimal list, but below is the list I use with Hallowed Martyrs detachment. In addition, my collection also has 1 more squad of battle sisters, 1 more squad of Repentia 10 models, 1 more Imagifier, and Morvenn Vahl. Please let me know what I should change in the list and if I should use another detachment based on the collection I have. Some general advice on how to play them may also help me out. Thank you in advance for any help you can give.

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+ FACTION KEYWORD: Imperium - Adepta Sororitas

+ DETACHMENT: Hallowed Martyrs (The Blood of Martyrs)

+ TOTAL ARMY POINTS: 2000pts

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+ WARLORD: Char2: Saint Celestine

+ ENHANCEMENT: Chaplet of Sacrifice (on Char3: Canoness)

& Mantle of Ophelia (on Char4: Canoness)

& Through Suffering, Strength (on Char5: Canoness with Jump Pack)

+ NUMBER OF UNITS: 17

+ SECONDARY: - Bring It Down: (3x2) - Assassination: 7 Characters

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Char3: 1x Canoness (85 pts): Hallowed Chainsword, Condemnor boltgun

Enhancement: Chaplet of Sacrifice (+25 pts)

Char4: 1x Canoness (80 pts): Hallowed Chainsword, Inferno pistol

Enhancement: Mantle of Ophelia (+20 pts)

Char5: 1x Canoness with Jump Pack (100 pts): Blessed Halberd

Enhancement: Through Suffering, Strength (+25 pts)

Char1: 2x Daemonifuge (85 pts)

• 1x Ephrael Stern: Bolt pistol, Sanctity

• 1x Kyganil of the Bloody Tears: The Outcast's Blades

Char6: 1x Hospitaller (60 pts): Bolt pistol, Chirugeon's tools

Char7: 1x Imagifier (65 pts): Bolt pistol, Boltgun, Close combat weapon

Char2: 3x Saint Celestine (150 pts): Warlord

• 2x Geminae Superia: 2 with Bolt Pistol, Power Weapon

• 1x Saint Celestine: The Ardent Blade

10x Battle Sisters Squad (105 pts)

• 9x Battle Sister

6 with Bolt pistol, Boltgun, Close combat weapon

1 with Simulacrum Imperialis, Bolt pistol, Boltgun, Close combat weapon

1 with Bolt pistol, Close combat weapon, Ministorum flamer

1 with Bolt pistol, Close combat weapon, Ministorum flamer

• 1x Sister Superior: Bolt pistol, Close combat weapon, Chainsword, Boltgun

10x Battle Sisters Squad (105 pts)

• 9x Battle Sister

7 with Bolt pistol, Boltgun, Close combat weapon

1 with Bolt pistol, Close combat weapon, Multi-melta

1 with Bolt pistol, Close combat weapon, Meltagun

• 1x Sister Superior: Bolt pistol, Close combat weapon, Power weapon, Boltgun

1x Castigator (160 pts): Armoured tracks, 3x Heavy bolter, Castigator battle cannon, Hunter-Killer Missile, Storm bolter

1x Exorcist (210 pts): Armoured tracks, Heavy Bolter, Hunter-Killer Missile, Exorcist Missile Launcher

10x Repentia Squad (160 pts)

• 1x Repentia Superior: Bolt pistol, Neural Whips

• 9x Sister Repentia: 9 with Penitent Eviscerator

5x Retributor Squad (120 pts)

• 1x Retributor Superior: Bolt pistol, Close combat weapon, Chainsword, Boltgun

• 4x Retributor: 4 with Bolt pistol, Close combat weapon, Multi-melta

5x Retributor Squad (120 pts)

• 1x Retributor Superior: Bolt pistol, Close combat weapon, Power weapon, Boltgun

• 4x Retributor: 4 with Bolt pistol, Close combat weapon, Ministorum heavy flamer

10x Seraphim Squad (160 pts)

• 1x Seraphim Superior: Close combat weapon, Bolt pistol, Plasma pistol

• 5x Seraphim: 5 with 2x Bolt pistol, Close combat weapon

• 4x Seraphim with Special Weapons: 4 with Close combat weapon, 2x Ministorum hand flamer

1x Sororitas Rhino (75 pts): Armoured tracks, Hunter-Killer Missile, Storm bolter

10x Zephyrim Squad (160 pts)

• 1x Zephyrim Superior: Sacred Banner, Power Weapon, Plasma pistol

• 9x Zephyrim: 9 with Bolt pistol, Power Weapon