I've only played a few games with Myranda leading the crew, but she seems extremely strong for it (as you effectively get a free Cerberus, which is a big swing at low as games). Personally I haven't used non-arcanist beasts for ages. My impulse would be a list of Cerberus, 2 Razorspines, 2 molemen, and something else to fill in points.
That gives plenty of survivability (for turf war), plenty of speed (for stake a claim), and plenty of Cerberuses (for "because I can").
From wave 2 you might want to consider a blessed of December, or maybe the big bear for stake a claim. Perhaps consider Cojo.
Just remember that Myranda will turn into whatever you're missing.
Good luck and enjoy