Only 3 Nissa seems kinda odd and I did play 4 for a very long time but it was kinda clunky for me in many occasions people play cards like Mystical Dispute, Aether Gust, Negate and drawing 2 or 3 Nissa often forces you to make unfavorable plays
We both are gonna sleep in the bed
5 Called By The Grave Is Another Way To Get Around Hand Traps Called by the Grave is a Spell card that can target one monster from the opponent's Graveyard, banish it, and prevent the opponent from using that Monster's effects for the rest of the turn
Creatures with activated coin flip abilities are even better because you get to choose if you even want to take the risk
Few other colors in the game come close to blacks ability to outright murder your enemies creatures, ignoring things like indestructible, pump spells, or even the dreaded blue bounce with its hand destruction capabilities
Duelists will keep using weaklings for a long time, so youll secure your victory for the first 10 Stages or so just by favoring high-ATK monsters that dont require a Tribute