Isn't this all getting away from the point? In particular:
If you get a little slow, add the power. If it's a regular technique, it's purely sloppy.
I would have thought the only justification for taking the engines through a sizable temperature cycle, and possibly making your field performance a little iffy, would be if the aircraft suddenly increases its sink rate and you had to do
something.
There are aircraft where landing performance is based on throttles closed in the air. In a short field situation on jet transport aircraft, I personally liked to be a tad deeper into the drag curve and with stable commensurate power. It really did give the spool-up improvement needed to cope with nature's surprises. But, a late-state engine failure had to be built into one's cunning plan.