Sweet deck! I have been thinking about building a superfriends deck, and I'll be following yours for
inspiration. Anyway - my thoughts on the deck:
You have 2 Taigas, so only 10 cards to cut
I feel like 45 lands is a lot, since you have a large number of mana rocks. You could probably cut 3-4 more lands, so that you don't get flooded. You could even cut more and replace them with card filtering/cantrips like
Sensei's Divining Top,
Preordain etc.
Your superfriends package can be trimmed; I'm not sure you would consistently have lands in the yard for
Wrenn and Six to return, and his -1 is really weak in this format. I also believe
Ral Zarek does not have the support that he needs.
Mox Amber might be another cut, since it doesn't help you when you need it the most - you need to cast a planeswalker first. It could be better not to just cut it, but to replace it with a different mana rock.
I do agree with the
Honor-Worn Shaku not being good enough, but again, I'd rather replace it with a different mana rock. The deck seems really mana hungry.
Flux Chaneller or
Tezzeret's Gambit might be nice inclusions, have you considered those?