It's excluded because you're raising dead people who retained their jutsu's to fight for you. If it's one on one then it defeats the purpose of 1 v 1. I personally exclude Kurama because he is his own entity that basically recharges Naruto while everyone else is stuck watching their chakra pool but apparently Kurama can be debated. Raising 5-10 people is not. Look at the story now. You have to seal them and even that takes a long time. Edo tensei is a no-no.
This
Also to add, kabuto has only used edo's to fight
FOR himself, not alongside himself in battle...
We dont even know if he can summon, and effectively use all of his edo's in battle. For 1, the edo's who arent being fully controlled can
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orders of the caster.
Also, the strong shinobi which kabuto possesses (pretty much all of them), have the ability to
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full control as well...
If kabuto was to pull out 30+ edos and fight along side them with SM, not only will some of them contradict orders, but others can even resist full control
I hate when people use kabuto's edos in a battle because they have no idea how it would even turn out (the edo's could end up fighting each other, releasing themselves from control via emotions, resisting and even contradicting kabuto's direct orders, etc....)
Way too many variables, and kabuto cant fight his enemy and control edo's simultaneously.