Okay firstly diana never showed better skill feats than hela or thor, thor showed enough martial arts in arena battle and showdown at castle against hela to edge the gap between him and diana while hela soloed an entire army while getting tagged 3 or 4 times, that's better than Diana's feats against human soldiers.
Secondly what makes you think she is invulnerable to lighting? This has been debunked multiple times that ares's lighting =\= Thor's lighting and she had to use her bracelets to shield absorb the initial impact and the lighting was too slow compared to Thor's lighting, what would she do if thor drops the lighting he did on hela in Ragnarok?
Regarding her speed, yeah she is fast but thor has reacted to things like chaturi lasers and hela's swords at point blank range.
And i beg to differ that her sword which failed to cut steppenwolf would kill thor or hela.
And i was talking about stormbreaker but now that you have mentioned it, i do believe Thor's lighting cloak would pose a major problem for team dceu.
@bullpr: yes but then i also mentioned "enchanted" it seems that uri was already enchanted right after Thor called it in his hands.
Adamantium had no special magical properties except being nigh invunerable thanks to dense structure/molecules but uri is not only super dense but has also magical properties like healing, channeling lightning, open bifrost remotely, being able to cut through a beam of fully completed IG even though it wasn't full powered beam and being able to be called upon by thor which would directly resist Magneto's manipulation assuming he can even manipulate it.