Is this a new tank? If so....no on the Turbo's, nothing for them to eat. IMO scratch the Blue Leg Hermits. Definitely get the Scarlets, but 3-5 is plenty. Yes on any Nassarius Snails 3-5 only. 5-10 Cerith would be plenty. Peppermint Shrimp ok.
Also get a small jar of Marine Algae Wafers. Especially in a newer tank where supplemental feeding will be a must.
I run a 40B