Grimtuff wrote:
Steelheads are always good. A nice cheap and cheerful unit. Anyone who does not like them is lying.

I don't like them, and I'm really not lying.
Do not take this as me trying to talk anyone out of them. They're every bit the good unit that people say, and it's more a personal choice on my part. For one, I'm just not a fan of the models (I've seen someone sit and assemble them and I was like "I'm never doing that."), and for another, I seem to always want those synergies like the Cavalry and Stannis whenever I even take a look over them in War Room. For a beginner just starting out the synergies aren't so important, but it is something to keep in mind as you grow your collection, especially if you want to play competitively.
That Magnus list is a great start, and has everything that you could ask for as far as learning the game goes. The Nomad is an amazing Warjack, and the Mule is often undervalued in the post Collosal Meta. Kell is also one of the game's best snipers, 2 shots at Rat 10 is near guaranteed to snipe out two single wound infantry each game.