Since you're new at this, make the best print you can, using your usual technique. Then try split grade, so you can compare your results.

As Michael's post points out, there is a difference of opinion. If your high and low filter exposures are the same, he's right- you can get the same result with an intermediate filter. I split print, and never have the 2 use the same exposure time, which is why I think it's an effective printing regime.