Malta in 4 days
I'll be visiting Malta for only 4 days (which means I'll have to come back).
What would you recommend, for a first time visit ?
I've got on my list: La Valette, Cottonera, Marsaxlokk, M'dina
... but I don't know if I could visit more or if it's already enough for 4 days (taking into account transportation time and the fact that days are short now)...