You guys play me the most, I've decided to change my list for the harder.

HQ
Shrike

Elites
10 Assault terminators
Srg has LC

Rifleman dread

Troops
10 marines
Melta
Multimelta
Combimelta
Powerfist
Rhino

10 marines
Melta
Multimelta
Combimelta
Powerfist
Drop Pod

10 Scouts
Sniper Rifles
Missile Launcher
Telion

Fast Attack
Landspeeder
Typhoon Launchers

Landspeeder
Typhoon Launchers

I got 160 pts left. What I was thinkin was;

3 Multi-Melta Attack Bikes. Adds anti-tank and AP 1 weapons and high pressure

Or

5 Sternguard with 2 lascannons (Anti heavy tank mostly, but can also shot infantry pretty well)

Or

6 Sternguard with 2 missile launchers (As above)

Or

Master of the Forge
Power weapon
Digital Weapons (drops in with drop pod squad, adding Shooting and CC to that squad)

Or

Dev squad (5 man) with 4 rockets. (Adds anti tank and anti infantry)

I'm mostly leaning toward either of the sternguard or the attack bikes...

Lascannon Sternguard, Devs or MoF with Conversion Beamer (drop some scouts and plonk him with them). Telion might be able to give him BS6 too, but I'd have to check that.

Why not the attack bikes?

Because the have to get really close to the enemy to work, and unless you have a lot of major threats operating in that threat range, they just die.

That said, I don't think heavy bolter squadrons are terrible, though I'd still rather take speeders and shoot missiles from range.