SS,
If you maintain the same attitude as you were flying pre slip, you will have already built in a safety element. To use a slip to it's full potential though, a higher nose up attitude is required and is still IMHO safe.
Could you explain that a bit more? My naive thoughts are that if you hold the same attitude in the slip (with its higher rate of descent), that would give you a higher angle of attack. Where does the 'built in safety element' come from?
Intuitively, I think I'd find myself lowering the nose to maintain AoA/airspeed, as I would if I reduced the power. What am I misssing?
Mark