It makes more sense to have a stronger card in this slot. There's not a TON of enchantment removal in the cube, but I think even given that fact Lyrist was not getting used.

Reanimation isn't really a thing white needs to do or wants to do in this cube. Duty fits the themes white aligns with and is a strong piece of protection

Heat Shimmer is off theme, Bolt isn't. It's just a great removal piece that all red decks will want.

Looking to reshape red a bit. This is likely long term, but I feel like there isn't enough mechanic cohesion available for the color as it sits now.

Although discard is the RB theme, it doens't mean I need to shoehorn in every madness card I can find. I think that the ability to ramp more mana out and enable a big trample options seems better.