They do have certain stops and scheduled time so you have to be careful estimating the time. Here are some of the stop overs: Blueboz - Market market - Buting in Makati-Taguig Area. They also pass along Pasig but I'm not sure of the names since I'm not a Pasigueña. I'm just pretty sure they have a stop at SM Center Pasig and Vargas.
City link buses have schedule trip every 30 minutes. It takes about 10 minutes from the terminal to Blueboz (Makati-Taguig), so just do the Math on when you should expect it. Let me just say that it's better to be early than sorry, right? Expect a fare of P21.00 up depending on your location.
Arriving to Eastwood, the bus has a drop off area at the Citibank, and then they will travel round to the terminal at Orchard road.
Here's a copy of the bus schedule, hope this helps.