As I already said, in the current meta with vehicles and other new powerfull artifact
abrade is better main deck than cut ribbons, especially considering the fact that you have 'embedded' slow removal with your -1 counters engines so the 1 damage difference is worth the instant speed, and since you want to be aggro the ribbons half is not all that great in a 3 color deck, and again 4
blazing volley maindeck is too situational, lastly even if you want to play
the scorpion god that bad a 4 of is too much since he is legendary AND recursive and hard to kill you don't want him in your hand the early game and then drawing him again, since he is 5 cmc too, with 3 copies you have good chances to always play him when you have 5 mana. Instead I will add a second copy of Rhonas who is cheaper in mana and does wonders for the deck too. Samut is a questionable choice, the only white source you have is the channeler so I'm not conviced of her particular utility apart being a keyword soup:
glorybringer may be the superior option here, you don't want too many 5 cmc anyways so you should maximize their quality. A good idea in the 4 drop slot would be either hazoreth the fervent, since you're gonna topdeck easily, or
Arlinn Kord who does a lot of cool things for the deck(and she is bonkers with the
glorybringer of course)!