I'm not saying IV isn't a good guide, I usually go there first to get a general idea of a spec im learning. But like someone said above, glyph of riptide as mandatory?
The only fight i've glyphed it on is Blade Lord. Theres only a small window of downtime on riptide if you do cast 2 healing surges. Not to mention you can use chain heal. Hell, sometimes I even use unleashed fury + unglyphed riptide for a 70-80k crit in a matter of a GCD.