Looks like a good build…the only thing I might reconsider would be the engine; the Golden Eagle gives a speed boost to tracks. It depends on your playstyle; I like the extra speed so I can run away as appropriate.
I could technically use it since speed is very nice to have but since if I lose a track my game is over I thought maybe better to have extra HP for the tracks since I’m still a massive target anyways.
Huginn is ok with Whirls, but I’ve been finding that Whaler is really good with them. They already have a ton of impulse, and when you jack it up with the cabin you can really punish lighter builds.
Howl is also good with whirls, but might not have a big enough mass limit to work well with your concept.