I'm on the groupfighting side, but again.
Remember.
The more you like groupfighting, the more you start to not like duels, and vice versa. So, there is really no reason to fiercely debate it, and just include both.
Like, if I was to rate myself, I would say 88 groupfighting, 78 duels. It's the people who can play both well who are rated the highest.
Hence why Blood shouldn't be a 93, cause he can't duel. Neither can I, nor can many people, but his groupfighting talents shouldn't put him at #1 overall. If you weigh both equally, then what's the problem?