If you want to play Fanatic, I'd say cut off 4 Shocks for 4 Boros Reckoners. If not, its just horribly undervalued and 4 Spike Jester would have been better.
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What format is this? casual?
If im in non-sphinx shell, i always do at least 26 lands on top of Read the Bones , usually 4-of. allows me to keep a land-heavy hand. and imo a big attraction for Grixis is Cyclonic's Rift + Return interaction. Rift also works with Reap Intellect/Slaughter Games/counterspells in general. also consider Hypersonic Dragon. it is basically Stormbreath, that is worse against UW but better vs RG Monsters. This, Frostburn, and Master of Waves would be fun to side into when removal is boarded out against youi think shota yasooka top a gp early this year playing ub control. his list has some neat idea you can look into