Boggarts - a little side-aspect

[literature_Caro]

No: HPFGUIDX 144479

Relistening POA I started wondering whether a boggart is something
like a hybirdization of legillimency and a dementor: he is trying to
make you most scared AND he is doing this by reading in your mind what
that thing it needs to turn into would be.
Could it therefore be that 1. occlumency would be a equal good
protection from it than the ridiculus-spell and 2. the latter is some
sort of preparing step to acquire occlumency?
If so, would there be a shaped boggart if it faced Snape?

What about your thoughts?
Caro