The Sicarans are an illegal choice - they're a Heavy Support unit for a Space Marine Legion Crusade Army. Of course, you're free to houserule otherwise, but there's no rules on the FW website to use them as such.
Technically, you can't even ally them in with Codex: Space Marines, as they're not a valid allies option according to the Matrix in HH:Betrayal.
Is the Shield Eternal all that useful on a 2 Wound Character?
If you're okay'd to run Sicarans, drop the Heavy Bolters. They don't kill all that much and being Fast vehicles, you can move at full pelt and still fire your Accelerators. It gives you more points.
As to the rest, I don't play with Space Marines all that much now that the Heresy list is available. Just a quick thing about Sternguard - they're almost universally better with Combi-Weapons to make use of the special bolter ammunition.
Technically, you can't even ally them in with Codex: Space Marines, as they're not a valid allies option according to the Matrix in HH:Betrayal.
Is the Shield Eternal all that useful on a 2 Wound Character?
If you're okay'd to run Sicarans, drop the Heavy Bolters. They don't kill all that much and being Fast vehicles, you can move at full pelt and still fire your Accelerators. It gives you more points.
As to the rest, I don't play with Space Marines all that much now that the Heresy list is available. Just a quick thing about Sternguard - they're almost universally better with Combi-Weapons to make use of the special bolter ammunition.
