My Order is...
Louisa - Lovely, classic and not too popular at the moment. If you say it's borning and wanted more interesting you could go for Eloisa/Elouisa, which is nice too
Miranda - Nice, underused name. Strong and very suitable for an adult, but could also have cuter nicknames for a child (Mimi, Miri, Andie)
Carlotta - Okay, but i would love it if it was Carly or Charlotta.
Erika - Prefer the Erica spelling, but an okay name. Quite American compared to the others on your list.
Clarissa - Sorry, but i will be that one who hates this name! IMO it's too posh, prissy, snobby, private schoolgirl sounding. Lissa or Lissie are okay, but the full name is a no.