You're the one that decided to compare attack arts to determine whether or not group buffs would have worse dice than single-target buffs. Well it turns out that group attacks have worse dice then single-target attacks. If comparing attacks was a valid choice in the first place that means group buffs will have worse dice than single-target buffs.
Temporarily ignoring the fact that SCS is a purely single-target self-buff, arguing that since the two of them give different types of bonuses the dice totals don't matter still does nothing to advance your claim that group buffs get the same bonus dice as single-target buffs.
I am sorry, but you are the one who argued that self support art have higher dice than area art, then tried to compare two single target
techs and ignored the comparison between area art and single target art.
Given you changed your argument midway through, I
assumed you were honest and then compared the buff in their entirety. Are you back to arguing that self-art have higher dice than area-art, and then we can go back to comparing area-art dice to single-character art?
Or are you going to keep pretending that a multi-attack from a single-target art is the same as a 'group attack', which would somehow translate to area arts? There are multiple examples of area arts here, and they all have comparable/better dice than single character arts, and single techs have comparable dice to area techs.
Please actually tell me what is your current argument: is it about area arts, about multiple-attacks techs, about group attacks, what is it? If it's about Area art, please compare area art to non-area art, and if it's about multiple attacks... well, we only have two examples of multiple attacks (Liling's dancing blade and Meteor shower) and I am not sure what that has to do with buff arts?
Show a minimum of good faith, and don't lie, please.