Ah, thanks for reminding me to donate to the Wikimedia Foundation.
Thebazilly
The great thing about BG3 is because the game hews so close to the 5e rules, a lot of build guides for tabletop are perfectly valid:
https://rpgbot.net/dnd5/characters/classes/#druid
Do note that the way Wild Shape works is one of the biggest differences in BG3 from 5e (can't use abilities from multiclassing like Rage or Flurry of Blows in wild shape, auto-scaling animal forms, etc.), so take it with a grain of salt.
Any persistent AoE damage spells seem to be extremely good, especially if you can set them up in a choke point and continually shove enemies back into them. Hunger of Hadar, Wall of Fire, Cloud of Daggers, Spike Growth, etc.
Spells that reposition enemies can also take the place of shoves: Thuder Wave, Eldritch Blast with repelling invocation. You miss out on loot if you kill a boss this way, but sometimes the cheese is too delicious.
Spirit Guardians has been good to me. Sometimes I just have Shadowheart cast it and spend her action dashing through all the enemies on screen.
Would definitely recommend giving Astarion the Thief subclass for the broken bonus action economy. It meshes well with his vampire bite ability.
Thank you! I keep seeing reporting about this study, but I want to read the actual thing!