If you notice black decks keep doing well and red decks seem to struggle, swap out some of the weaker red cards for stronger options, and nerf the black archetypes, for example
Pinnacle Starcage Temporary Lockdown replacement
That said, Tarkir: Dragonstorm gave us a large number of Abzan cards, with a notable subset that leans heavily into toughness-matters strategies
Compared to similar creatures, while it has no guarantee if it misses, it mills one extra card and also has a bonus in town
This might hit $2-$3 if it does become an important sideboard card, but thats its top end
The deck's included Clan Crafter background synergizes well, but the green Raised by Giants background is probably a better dedicated choice if players want to run Baeloth as their commander