[2000] - Space marines - Please help improve my list Imperial fist/Salamanders

Is this an improvemnent? i have 15 points spare off 2000

Sternhammer Strike Force

Chaplain,jump pack with Vanguard veterans

5 Tactical marines, Plasma Cannon
5 Tactical marines Heavy Bolter
5 Tactical marines Heavy Bolter

Devastator squad 4 lascannons

Contemptor dreadnaught Kheres assault cannon

Bike squad 4 bikes 2 Plasma Guns ,combi plas
Assault bike heavy bolter


Auxillary
1st Company task force

6 man Sternguard squad 3 combi grav
1 heavy flamer
Drop pod

5 man Sternguard squad
Razorback twin linked Lascannon

5 Man vanguard veterans
Assorted weapons and jumppcks

Allies

Salamanders

Techmarine Conversion beamer
2 Servitors Heavy bolters

Assualt squad evisecerator ,2 flamers(master crafted Chainsword sergeant)

Tactical squad ,combi flamer,flamer,multi melta
Rhino

Dreadnaught twin linked las cannon

In what ways do you want it improved, what is it not doing that you would wish it to? What armies do you face? How are you using it?