!!! WARNING !!!
These analyses may contain spoilers for their respective series. Some of these series may not be suitable for younger audiences.
Prediction: Both fighters have an impressive arsenal of magic at their disposal, but Kumoko is outclassed by the scale of Doctor Fate’s magic. Kumoko’s stronger magic actually hurts her and is only healed when she levels up.
Winner: Doctor Fate
Rimuru Tempest (Tensei Shitara Slime Datta Ken) vs Diablo (Isekai Maou to Shoukan Shoujo Dorei Majutstu)
Prediction: Thanks to Rimuru’s main ability to absorb and assimilate skills and powers of defeated foes, Rimuru should easily beat Diablo. Rimuru should beat Diablo mainly due to being able to create an anti-magic area. Diablo’s main abilities rely on his use of magic.
Winner: Rimuru Tempest
Prediction: While Zatanna is powerful, Arata should win this fight because his main form of magic is dispelling magic. Zatanna also has the penalty of having to chant incantations backwards to use strong forms of magic.
Winner: Arata Kasuga
Prediction: Makoto may be able to buff himself and debuff his enemies using his magic realms but Dr. Strange should be able to combat this with his insane variety of spells. The only stat that Makoto exceeds Dr. Strange in is magic capacity.
Winner: Dr. Strange