I grab instead of jab a lot at those low percents lab can be punished percents lower than ftilt
ftilt is true into jab at lower percents and against most of the cast a grab from those jabs can't be contested. fox sheik falco and a punch of there character can jab you out of you jab though because of their high fall speed and ridiculous jabs. Renki jabs me out of my jab combos a lot.
but yeah ftilt grab is pretty safe because of grab armor against most of the cast. the natural reaction for most people is to sheild and grab beast that. sheik's grab is fast enough to beat other grabs and most ground attacks and even spot dodges (which would have to be timed frame perfectly you can't buffer a spot dodge)
and at those low percents your throws sets up well into traps and it helps to decay the throws.......
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oh ftilt run through piviot grab is funny looking. and pretty safe against slower characters and will give you time to see how they react and help as a mix up for ftilt