Very much depend on the rest of your roster but I’ll go Inari for being closest. A niche but quite a useful hero.
Delilah or a second Poseidon is fine too.
Choose one that fit into your roster and suit your playing style.
Sif. I have both her and Inari maxed, and the damage reduction coupled with the reflect is amazing.
I’d say Delilah or if you’re ready for dupes Poseidon2 or joon2…
Good words of advice above… play style? Complete roster?
Who would you have the most fun with?
Sif for sure.
You have options Sif, Delilah are great or a second Joon or Poseidon wouldn’t hurt or you can wait on Thor and Odin to drop