[RavenX]

You will have to figure out the timing on this to get it calculating correctly, I would start in Final 10000 to see if that picks off all the numbers correctly. Once its working you can just bootstrap the tracker to the ability.

These lines of code should be sufficient for a tracker to autocalculate what you need.

~our hit points are twice our wizard level plus int mod
field[trkMax].value += hero.childfound[cHelpWiz].field[cTotalLev].value * 2
field[trkMax].value += hero.child[aINT].field[aBonus].value

Or just build it as a class special.
Check the Show in Tracked Resources? checkbox to add the tracker, and do it with the abValue fields.

The advantage of doing it this way is that the abValue fields can be accessed from other scripts. So say you have an ability that further modifies this one which the wizard picks up later on, you can modify the abValue fields to deal with the add ons.
Eval Script 1

~our hit points are twice our wizard level plus int mod
~get our wizard level
field[abValue].value += hero.childfound[cHelpWiz].field[cTotalLev].value 
~double our wizard level for hit points (field[abValue2].value stores the multiplier)
field[abValue].value *= field[abValue2].value
~get our intelligence modifier
field[abValue3].value += hero.child[aINT].field[aBonus].value

~sum our doubled wizard level with our int mod to get the total hit points calculated.
field[trkMax].value += field[abValue].value + field[abValue3].value

In the above code, the *= line will act as a multiplier. field[abValue2].value should be set equal to 2 initially. If another ability comes out that increases the multiplier later on, you can then script it to change that field.

Another advantage of doing it this way is that you can do each part in different scripts if needed too.

I'd do each line of code there as its own script, in progressively later timings so the script can be modified later on if needed. It would be 4 scripts long but that will allow you to access and change it if a new book ability does so later without having to recode the scripts.