Power for speed , attitude for speed they both work. As for flare height, just wait until you see out of the corner of you eye, the Instructor flinch, swear or dive for the controls, smoothly reduce power while raising the nose to the hold off attitude. From here you have 2 options. Option 1, as the wheels kiss the tarmac, turn to your instructor and say "Did I do it right sir?", or, Option 2, apply full power and recover from the balloon the instructor has put the aircraft into.
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