This deck looks so good, I want to play against it before I suggest any huge shifts! Well done fredo! I'm sure the mana will evolve over time. The only two big thing's I see is that Fire Giant's Fury is unplayable (this card is perfect, but you don't have any giants...) and this deck screams play 4x Blossoming defense. Kill my creature after I pump it? How about in response fizzle your spell and pump my creature more? Also, I don't how much you want trample from run amok, but Giant Growth is legal in this format as well if trample doesn't matter as much (because a number of creatures have it). That's on you to test though. Actually, colossus gives trample too, so I swapped them. I like two raking claws over unleash because it does the same thing but better, especially on a trample creature, and has cycling when you need it too. Raking claws is better with a cast rimrock knight too. I get it's a non-bo with vindicator, so that's your call, but I rather raise the floor personally. Alternatively, you could consider a permanent bump in those two flex spots that help with attrition, like sentinel's eye's or escape velocity. This deck will want 4 apostle of purifying light in it's sideboard, which overperforms in any matchup reliant on black removal or creatures (which is a lot).

I also added 2 kazuul's fury to the manabase. Basically free to do, and acts as another way to close the game/ get value from removal spells/ removal if you really need it.

Also earthshaker khenra might just be better than burning-tree shaman. Are we going that wide really? You would know better than I about that.