IMO screensavers are not needed with LCD and only shorten a LCD screens life.
Very true, and ASUS recommends to, at a minimum, set the screensaver to blank after 5 minutes of inactivity.
I choose to shut down my monitors after 10 minutes, and have a blank screensaver after 5. Those of my notebooks also, those are LCD screens. The ASUS monitor mentioned is actually LED, however the same applies.
Seems that the original intent of screensavers were to prevent permanent damage to older CRT monitors from still images burning into those, some of which are still in use. Today, few uses these, for starters they're bulky and takes up half of one's desk space, these also uses more energy, and forget HD content on one of those.
While some are huge fans of exotic screensavers, I never have been, instead choosing to extend my monitor's life & saving energy, quality ones are more costly than some mid-range GPU's, and I cannot afford to replace these often. Taking proper care of these greatly extends the life, as long as there's no manufacturing defect. Normally this will be discovered way before the warranty runs out.