This post is just meant as an extension of my previous P5R builds write-up, showing some Personas that might not be the absolute best, but are still very good and fun to use. I might update this post going forward if I continue making more different builds worth posting.
For most magic-based Personas, Mighty Gaze is used because it strengthens multi-target magic by 20% and can exceed the normal 100% damage cap (unlike Pagan Allure, which cannot exceed the cap). Will of the Sword could also be used since it’s +20% when Concentrated. Mighty Gaze can be swapped for Allure of Wisdom (reduces SP cost of Magic skills by 75%) or the other SP reducing traits if you prefer, but in NG+, SP isn’t a huge issue. I made a separate write-up on traits here. P5R Fusion Calculator with skill descriptions is here. Main posts for P5/P4:
Kaguya
Lucifer
Magatsu-Izanagi
Hollow Jester raises Attack by 40% per foe inflicted with an ailment. With 5 enemies, attack can be raised 5.37x (1.4⁵), leading to huge damage numbers in the right scenario.
Alice
With Omen and Mudo/Hama Boost, this should result in a 100% insta-death rate for everything that doesn’t resist/block Bless and Curse. Alice’s original trait Just Die could be kept, but you’ll restore full SP after every battle if you have Victory Cry, so it isn’t really needed. Just Die can still be useful during a 1st playthrough, though.
Daisoujou
Tsukiyomi
Abyssal Wings isn’t anywhere close to Shining Arrows, but it’s still the best Curse-type move in the game and exclusive to Tsukiyomi.
Metatron
Divine Judgement/Demonic Decree honestly aren’t too useful as skills, because the same enemies that are susceptible to them can also be affected by Bless/Curse insta-kills, but they’re still kept mainly for the animations/variety.
Beelzebub
Satan
Satan can either be used for Ice, given the skills learnt naturally, or Almighty, considering Black Viper is only available to him and Satanael.