There's no one fit sizes all setting for slap... but I'll share the main rule which works for me:
For slap settings I usually boost the lows and higs and cut a little bit the mids. Try the SWR or the Hartke amp simulator.
Take my advice as a starting point , but the answer to the right slap settings of your pedalboard is in your ears.
There are only two kinds of music in the world. The one which likes you and one which doesn't. /Zoom Owners Club #165