Looking at the US PS store, atm Lies of P is on sale at $29.99, and this expansion goes for the same price, bringing the total to $59.98 if you buy them separately. This seems like the best option right now.

If you are a plus member, the Overture bundle, which is the exact same thing but in a single purchase, is on sale for $60.29 (31 cents more). Otherwise it’s $89.99.

For me personally, I’m interested in the game, but my time is split between so many other really great games at the moment that I don’t see myself really tempted into purchasing this until the bundle gets to something like a 50% discount.