Mulligans
Wtf, Aimed Shot make this deck so OP, Mankrik not needed and now to slow.
Barak: Always needed
Rinling´s Rifle: In some situations needed (f.e canal surger -> freezing trap) so If you don´t own this legendary weapon it is replaceable with other stuff.
Cornelius Roame: win Condition against control that hit the right early game cards, because If you ran out of sources this is pretty useful but I needed that from 10 matches only one time. It´s slow and with Tracking and Barak you have good and faster draw possibilities.
Use Devouring Swarm for double Trampling Rhino attack, you can also use the 1/4 weapon that force attack you minions but this spell is quite faster.
Edit: Tried it with lorekeeper instead of rinlings Rifle and it´s in my opinion the best opportunity, you face your opponent with all what you have and then you have 3 cards to refill, if you hit lorekeeper at 5 you just roame next turn and then you can barak so it´s a go face then refill than go face deck 🙂