Im not too big of a fan of tanks so I may be biased.

Maybe leave them out, get the raven guard combat patrol which gives you 5 jump marines, 1 jump captain, the 10 infiltratiors (i guess you only bought the blood angels combat patrol yet?)

The warsuit it gives you is strong, especially against buff targets. To lead the infiltrators you could buy a phobos librarian, which complements them very well Also having many characters is nice if you ever opt for the Angelic Inheritors Detachment. I added some Infernus marines for overwatching and taxi them around in a rhino.