If SS is casted fully with my 442 AC equals a reduction of 92.8% against physical attacks, or in other words it is like 13.9 times my HP without reduction in damage.
With another 10% reduction with PL that comes to:
* 50mil HP through PL = 13.9 * 1.1 * 50mil = 764.5mil HP
* 20mil HP without PL = 13.9 * 20mil = 278mil HP
totals in: 1042.5mil = 1 billion HP :)
