plovlife

ok in your fight class you would need to add this into you fight class file its self. ( this is the easiest way to help you out )
 
    <FightClassSpell>
      <SpellName>RunMacroText("/Use Potion of Luck")</SpellName>
      <FightClassConditions />
      <Priority>38</Priority>
      <Timer>1200000</Timer>
      <NotSpellIsLuaScript>true</NotSpellIsLuaScript>
    </FightClassSpell>
    <FightClassSpell>
      <SpellName>Lifeblood</SpellName>
      <FightClassConditions>
        <FightClassCondition>
          <ContionType>IsSpellUsable</ContionType>
          <Param xsi:type="FightClassConditionStringBool">
            <Name>Lifeblood</Name>
            <Need>true</Need>
          </Param>
        </FightClassCondition>
        <FightClassCondition>
          <ContionType>HealthPercent</ContionType>
          <Param xsi:type="FightClassConditionNumber">
            <Type>SmallerOrEqual</Type>
            <Value>99</Value>
          </Param>
        </FightClassCondition>
      </FightClassConditions>
      <Priority>37</Priority>
      <Timer>120000</Timer>
    </FightClassSpell>