Depends on the scenario you are aiming for.
Being realistic you have to remember that most of their unusual attitude recovies will be at altitude, meaning the only power you need is gravity, you are high enough to not require power don't use it. However, I let them explore using power to recover for the purposes of low altitude procedures. But more often than not I find their recoveries with power tend to get them into more trouble. For the typical VFR weekend flyer/hobbiest I stick mainly with power off recoveries and focus much more sternly on proper, swift, and effective aircraft COORDINATED flight as that will keep them from making a bad situation worse.
Remember, when they leave you and havn't done an unusual attitude in 10 years because so many people skip them on the BFR for a VFR pilot would you trust them to recover with power if they were severly nose high close to stall? I would expect a spin personally or at least one heck of an erratic looking hammerhead.
Now if you are teaching students that you know will be working towards commercial for professional pilots. I would put a little more emphasis on what they can really do since they will explore it and expand on it later. It won't be wasted information forgotten about along with most of the other stuff you teach your typical hobbiest.
On one last note, remember if this is just for VFR the recoveries don't need to be extremely complex. The focus is more on disorienting the student and allowing them to see what that feels like while trying to recover. The attitude can be irrelevant, if you can make your student think they are upside down spinning because of SD then who the heck cares what attitude the aircraft is really in they will be screwed up. The unusual attitudes are much more common and need much more focus once moving into instruments for IMC to VMC UA popouts.