They have two people with full counter and Percival can also absorb magic.
Also we don't know if they will fight in Britannia, the fairy realm or even the celestial realm.
Their victory will mean nothing if Lancelot holds back the whole time.
Its's possible he starts out holding back, but it won't be satisfying unless he goes all out at some point.
The training with the 4 evils will obviously not be enough, but I think it will still be a substantial jump in power. Howzer and Gilthunder's power level jumped by around 20% just from fighting a dragon in the druid cave, so the 3koa will likely be oer twice as strong from this one week of training.
It's a shonen manga, the only ones I see dying are Ban and Meliodas. Even then IIRC Nakaba has said he switched to Percy as MC because he didn't want to kill Meliodas and Elizabeth, so I'm iffy on Meliodas.
They have a different vibes, but that doesn't mean the similarities between them don't exist. Even their last interaction before Lancelot was possessed was used to highlight that Trustan would have done the same.
About Percival, people can have more than one friend. I'm not saying Tristan and...
Really? I found the parallels glaringly obvious. Come on Tristan even scared Lancelot just like Meliodas scared Ban. For me at least Tristan and Lancelot are clear foils to one another:
There is of course their circumstances - both princes, mixed race and sons of legendary heroes.
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Pre-timeskip base Tristan was weaker than Schwarz, post-timeskip base Tristan was fighting evenly with Isolde for a while, I can totaly buy him struggling against Beltreipe.
And I believe Dubs said he'd forge him a longsword (singular) so these must be regular swords.
Yeah but Diodora has such an all or nothing ability that it'll be very hard to make him useful but not too useful (unless the focus is more on his purgatory abilities).