While I like doomfall a lot as a card, the only point of the main deck discard is to provide a turn 1 play that can possibly stabilize us. With doomfall costing 3, i think it competes a little too much with other things I want to cast on turn three. That's the same reason why I'm wary about lay bare the heart because of how I'd rather a drover on 2. That being said if I did change up the discard it probably be for the set of lay bare and a single doomfall.
I really like Nissa over greenhulk, I think that's the proper move. Rhonas I'm iffy about but I see the applicstion.
Never // return seems slow but it could work if I decide that the singleton walk the plank is a better slot than the third torment
Thanks for the suggestions!