So I have a Seshat with 20 emblems and I love her. But… I might choose Lepiota.
As good as Seshat is she is still a sniper, debuffer with stats that are no longer best in the game due to the stat power creep from new seasons and heroes.
On defence I still use her but her most effective defence spot used to be healing aid wars where she could win from the wing due to her minions replicating and keeping her alive till the healing aid would kick in. The new range of Defence with Bera and Freya mean she has less of a place. Outwith those there are other options like Moreau, Killhare and Onyx, Dark Lord that can be at times on a par or better in defence.
I think in another 6months to a year or so she will become similar place to Lianna. Great sniper, but not first choice anymore.
If I had Lepiota currently along with Seshat at 1/1 I think I’d go Lepiota first. (Would do Seshat straight after though)