[Inokis]

I helped him work out a script using an addon:

function Blessing() 
	if not UnitAffectingCombat("Player") and not UnitExists("Target") then
		TargetNearestFriend();
		if ( UnitClass("target") == "Priest" ) or ( UnitClass("target")== "Mage" ) or  ( UnitClass("target") == "Warlock" ) or  ( UnitClass("target") == "Druid" ) then  
          			 CastSpellByName("Blessing of Wisdom (Rank3)");  
     		 elseif ( UnitClass("target") == "Rogue" ) or  ( UnitClass("target")== "Hunter" ) or  ( UnitClass("target")== "Paladin" ) or ( UnitClass("target") == "Warrior" ) then 
          			 CastSpellByName("Blessing of Might(Rank 5)");
		end
	elseif UnitInParty("Player") then
		TargetUnit("Party1");
		if ( UnitClass("target") == "Priest" ) or ( UnitClass("target")== "Mage" ) or  ( UnitClass("target") == "Warlock" ) or  ( UnitClass("target") == "Druid" ) then  
          			 CastSpellByName("Blessing of Wisdom (Rank3)");  
      		elseif ( UnitClass("target") == "Rogue" ) or  ( UnitClass("target")== "Hunter" ) or  ( UnitClass("target")== "Paladin" ) or ( UnitClass("target") == "Warrior" ) then 
          			CastSpellByName("Blessing of Might(Rank 5)"); 
		end
		TargetUnit("Party2");
		if ( UnitClass("target") == "Priest" ) or ( UnitClass("target")== "Mage" ) or  ( UnitClass("target") == "Warlock" ) or  ( UnitClass("target") == "Druid" ) then  
          			 CastSpellByName("Blessing of Wisdom (Rank3)");  
      		elseif ( UnitClass("target") == "Rogue" ) or  ( UnitClass("target")== "Hunter" ) or  ( UnitClass("target")== "Paladin" ) or ( UnitClass("target") == "Warrior" ) then 
          			CastSpellByName("Blessing of Might(Rank 5)"); 
		end
		TargetUnit("Party3");
		if ( UnitClass("target") == "Priest" ) or ( UnitClass("target")== "Mage" ) or  ( UnitClass("target") == "Warlock" ) or  ( UnitClass("target") == "Druid" ) then  
          			 CastSpellByName("Blessing of Wisdom (Rank3)");  
      		elseif ( UnitClass("target") == "Rogue" ) or  ( UnitClass("target")== "Hunter" ) or  ( UnitClass("target")== "Paladin" ) or ( UnitClass("target") == "Warrior" ) then 
          			CastSpellByName("Blessing of Might(Rank 5)"); 
		end
		TargetUnit("Party4");
		if ( UnitClass("target") == "Priest" ) or ( UnitClass("target")== "Mage" ) or  ( UnitClass("target") == "Warlock" ) or  ( UnitClass("target") == "Druid" ) then  
          			 CastSpellByName("Blessing of Wisdom (Rank3)");  
      		elseif ( UnitClass("target") == "Rogue" ) or  ( UnitClass("target")== "Hunter" ) or  ( UnitClass("target")== "Paladin" ) or ( UnitClass("target") == "Warrior" ) then 
          			CastSpellByName("Blessing of Might(Rank 5)"); 
		end
	else		
		if ( UnitClass("target") == "Priest" ) or ( UnitClass("target")== "Mage" ) or  ( UnitClass("target") == "Warlock" ) or  ( UnitClass("target") == "Druid" ) then  
          			 CastSpellByName("Blessing of Wisdom (Rank3)");  
      		elseif ( UnitClass("target") == "Rogue" ) or  ( UnitClass("target")== "Hunter" ) or  ( UnitClass("target")== "Paladin" ) or ( UnitClass("target") == "Warrior" ) then 
          			CastSpellByName("Blessing of Might(Rank 5)"); 
		end
      end
      TargetLastEnemy();	 
 end