@Tee Emm
It is true that the FCTM says " reverse thrust and speedbrake drag are most effective at high speed ", but you get full ground and flight spoilers after touchdown.
For takeoff, while holding the wheel displaced you are not getting any ground spoiler deflection, hence any comparison with the landing distance penalty for not using speedbrakes is not appropriate, in my opinion.
I agree with rat5's techique, that is what I use too, seems to work fine.