Spores druid is making the evil run pretty nice. Because it ignores the tabletop rule that you need to make a mainhand attack before you can make an offhand attack, you can do shit like cast a mainline druid spell, whack someone with the spores-buffed offhand to finish him off, then raise that dead enemy as a corpse.
Terrain control spells are also ridiculously overpowered because of the sheer number of choke points in this game. Enemies will kill themselves running through an easy-to-place spike growth before lae'zel whacks em twice and shoves them back through the thorns.
Dual scimitar druid is nuts. Nuts enough to allow me to hit level 4 before taking my first long rest on the highest difficulty,
after fighting the nonsensical battle at the Decrepit Sanctuary and getting Kagha to stop the ritual so I can kill them all later.