[ShadowChemosh]

This should get you what you want as long as I understood it correctly. I wrote this without testing anything so you may have to modify it.

~ Loop through all the spells of X
foreach pick in hero from BaseSpell where "thingid.spXXXXXX"

  ~ Check to see if this spell is bootstrapped by something
  if (eachpick.isroot <> 0) then

    ~ Check the bootstrap to see if its the correct ability
    if (eachpick.root.tagis[thingid.AbilityThatBootstrappedSpell] <> 0) then
      eachpick.field[trkMax].value = maximum(1,#attrmod[aCHA])
    endif
  endif
nexteach